[][src]Struct chrono::naive::NaiveDate

pub struct NaiveDate { /* fields omitted */ }

ISO 8601 calendar date without timezone. Allows for every proleptic Gregorian date from Jan 1, 262145 BCE to Dec 31, 262143 CE. Also supports the conversion from ISO 8601 ordinal and week date.

Calendar Date

The ISO 8601 calendar date follows the proleptic Gregorian calendar. It is like a normal civil calendar but note some slight differences:

Week Date

The ISO 8601 week date is a triple of year number, week number and day of the week with the following rules:

Chrono's date types default to the ISO 8601 calendar date, but Datelike::iso_week and Datelike::weekday methods can be used to get the corresponding week date.

Ordinal Date

The ISO 8601 ordinal date is a pair of year number and day of the year ("ordinal"). The ordinal number ranges from 1 to 365 or 366 depending on the year. The year number is same to that of the calendar date.

This is currently the internal format of Chrono's date types.

Methods

impl NaiveDate[src]

pub fn from_ymd(year: i32, month: u32, day: u32) -> NaiveDate[src]

Makes a new NaiveDate from the calendar date (year, month and day).

Panics on the out-of-range date, invalid month and/or day.

Example

use chrono::{NaiveDate, Datelike, Weekday};

let d = NaiveDate::from_ymd(2015, 3, 14);
assert_eq!(d.year(), 2015);
assert_eq!(d.month(), 3);
assert_eq!(d.day(), 14);
assert_eq!(d.ordinal(), 73); // day of year
assert_eq!(d.iso_week().year(), 2015);
assert_eq!(d.iso_week().week(), 11);
assert_eq!(d.weekday(), Weekday::Sat);
assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE

pub fn from_ymd_opt(year: i32, month: u32, day: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate from the calendar date (year, month and day).

Returns None on the out-of-range date, invalid month and/or day.

Example

use chrono::NaiveDate;

let from_ymd_opt = NaiveDate::from_ymd_opt;

assert!(from_ymd_opt(2015, 3, 14).is_some());
assert!(from_ymd_opt(2015, 0, 14).is_none());
assert!(from_ymd_opt(2015, 2, 29).is_none());
assert!(from_ymd_opt(-4, 2, 29).is_some()); // 5 BCE is a leap year
assert!(from_ymd_opt(400000, 1, 1).is_none());
assert!(from_ymd_opt(-400000, 1, 1).is_none());

pub fn from_yo(year: i32, ordinal: u32) -> NaiveDate[src]

Makes a new NaiveDate from the ordinal date (year and day of the year).

Panics on the out-of-range date and/or invalid day of year.

Example

use chrono::{NaiveDate, Datelike, Weekday};

let d = NaiveDate::from_yo(2015, 73);
assert_eq!(d.ordinal(), 73);
assert_eq!(d.year(), 2015);
assert_eq!(d.month(), 3);
assert_eq!(d.day(), 14);
assert_eq!(d.iso_week().year(), 2015);
assert_eq!(d.iso_week().week(), 11);
assert_eq!(d.weekday(), Weekday::Sat);
assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE

pub fn from_yo_opt(year: i32, ordinal: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate from the ordinal date (year and day of the year).

Returns None on the out-of-range date and/or invalid day of year.

Example

use chrono::NaiveDate;

let from_yo_opt = NaiveDate::from_yo_opt;

assert!(from_yo_opt(2015, 100).is_some());
assert!(from_yo_opt(2015, 0).is_none());
assert!(from_yo_opt(2015, 365).is_some());
assert!(from_yo_opt(2015, 366).is_none());
assert!(from_yo_opt(-4, 366).is_some()); // 5 BCE is a leap year
assert!(from_yo_opt(400000, 1).is_none());
assert!(from_yo_opt(-400000, 1).is_none());

pub fn from_isoywd(year: i32, week: u32, weekday: Weekday) -> NaiveDate[src]

Makes a new NaiveDate from the ISO week date (year, week number and day of the week). The resulting NaiveDate may have a different year from the input year.

Panics on the out-of-range date and/or invalid week number.

Example

use chrono::{NaiveDate, Datelike, Weekday};

let d = NaiveDate::from_isoywd(2015, 11, Weekday::Sat);
assert_eq!(d.iso_week().year(), 2015);
assert_eq!(d.iso_week().week(), 11);
assert_eq!(d.weekday(), Weekday::Sat);
assert_eq!(d.year(), 2015);
assert_eq!(d.month(), 3);
assert_eq!(d.day(), 14);
assert_eq!(d.ordinal(), 73); // day of year
assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE

pub fn from_isoywd_opt(
    year: i32,
    week: u32,
    weekday: Weekday
) -> Option<NaiveDate>
[src]

Makes a new NaiveDate from the ISO week date (year, week number and day of the week). The resulting NaiveDate may have a different year from the input year.

Returns None on the out-of-range date and/or invalid week number.

Example

use chrono::{NaiveDate, Weekday};

let from_ymd = NaiveDate::from_ymd;
let from_isoywd_opt = NaiveDate::from_isoywd_opt;

assert_eq!(from_isoywd_opt(2015, 0, Weekday::Sun), None);
assert_eq!(from_isoywd_opt(2015, 10, Weekday::Sun), Some(from_ymd(2015, 3, 8)));
assert_eq!(from_isoywd_opt(2015, 30, Weekday::Mon), Some(from_ymd(2015, 7, 20)));
assert_eq!(from_isoywd_opt(2015, 60, Weekday::Mon), None);

assert_eq!(from_isoywd_opt(400000, 10, Weekday::Fri), None);
assert_eq!(from_isoywd_opt(-400000, 10, Weekday::Sat), None);

The year number of ISO week date may differ from that of the calendar date.

//           Mo Tu We Th Fr Sa Su
// 2014-W52  22 23 24 25 26 27 28    has 4+ days of new year,
// 2015-W01  29 30 31  1  2  3  4 <- so this is the first week
assert_eq!(from_isoywd_opt(2014, 52, Weekday::Sun), Some(from_ymd(2014, 12, 28)));
assert_eq!(from_isoywd_opt(2014, 53, Weekday::Mon), None);
assert_eq!(from_isoywd_opt(2015, 1, Weekday::Mon), Some(from_ymd(2014, 12, 29)));

// 2015-W52  21 22 23 24 25 26 27    has 4+ days of old year,
// 2015-W53  28 29 30 31  1  2  3 <- so this is the last week
// 2016-W01   4  5  6  7  8  9 10
assert_eq!(from_isoywd_opt(2015, 52, Weekday::Sun), Some(from_ymd(2015, 12, 27)));
assert_eq!(from_isoywd_opt(2015, 53, Weekday::Sun), Some(from_ymd(2016, 1, 3)));
assert_eq!(from_isoywd_opt(2015, 54, Weekday::Mon), None);
assert_eq!(from_isoywd_opt(2016, 1, Weekday::Mon), Some(from_ymd(2016, 1, 4)));

pub fn from_num_days_from_ce(days: i32) -> NaiveDate[src]

Makes a new NaiveDate from a day's number in the proleptic Gregorian calendar, with January 1, 1 being day 1.

Panics if the date is out of range.

Example

use chrono::{NaiveDate, Datelike, Weekday};

let d = NaiveDate::from_num_days_from_ce(735671);
assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE
assert_eq!(d.year(), 2015);
assert_eq!(d.month(), 3);
assert_eq!(d.day(), 14);
assert_eq!(d.ordinal(), 73); // day of year
assert_eq!(d.iso_week().year(), 2015);
assert_eq!(d.iso_week().week(), 11);
assert_eq!(d.weekday(), Weekday::Sat);

While not directly supported by Chrono, it is easy to convert from the Julian day number (January 1, 4713 BCE in the Julian calendar being Day 0) to Gregorian with this method. (Note that this panics when jd is out of range.)

use chrono::NaiveDate;

fn jd_to_date(jd: i32) -> NaiveDate {
    // keep in mind that the Julian day number is 0-based
    // while this method requires an 1-based number.
    NaiveDate::from_num_days_from_ce(jd - 1721425)
}

// January 1, 4713 BCE in Julian = November 24, 4714 BCE in Gregorian
assert_eq!(jd_to_date(0), NaiveDate::from_ymd(-4713, 11, 24));

assert_eq!(jd_to_date(1721426), NaiveDate::from_ymd(1, 1, 1));
assert_eq!(jd_to_date(2450000), NaiveDate::from_ymd(1995, 10, 9));
assert_eq!(jd_to_date(2451545), NaiveDate::from_ymd(2000, 1, 1));

pub fn from_num_days_from_ce_opt(days: i32) -> Option<NaiveDate>[src]

Makes a new NaiveDate from a day's number in the proleptic Gregorian calendar, with January 1, 1 being day 1.

Returns None if the date is out of range.

Example

use chrono::NaiveDate;

let from_ndays_opt = NaiveDate::from_num_days_from_ce_opt;
let from_ymd = NaiveDate::from_ymd;

assert_eq!(from_ndays_opt(730_000),      Some(from_ymd(1999, 9, 3)));
assert_eq!(from_ndays_opt(1),            Some(from_ymd(1, 1, 1)));
assert_eq!(from_ndays_opt(0),            Some(from_ymd(0, 12, 31)));
assert_eq!(from_ndays_opt(-1),           Some(from_ymd(0, 12, 30)));
assert_eq!(from_ndays_opt(100_000_000),  None);
assert_eq!(from_ndays_opt(-100_000_000), None);

pub fn parse_from_str(s: &str, fmt: &str) -> ParseResult<NaiveDate>[src]

Parses a string with the specified format string and returns a new NaiveDate. See the format::strftime module on the supported escape sequences.

Example

use chrono::NaiveDate;

let parse_from_str = NaiveDate::parse_from_str;

assert_eq!(parse_from_str("2015-09-05", "%Y-%m-%d"),
           Ok(NaiveDate::from_ymd(2015, 9, 5)));
assert_eq!(parse_from_str("5sep2015", "%d%b%Y"),
           Ok(NaiveDate::from_ymd(2015, 9, 5)));

Time and offset is ignored for the purpose of parsing.

assert_eq!(parse_from_str("2014-5-17T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"),
           Ok(NaiveDate::from_ymd(2014, 5, 17)));

Out-of-bound dates or insufficient fields are errors.

assert!(parse_from_str("2015/9", "%Y/%m").is_err());
assert!(parse_from_str("2015/9/31", "%Y/%m/%d").is_err());

All parsed fields should be consistent to each other, otherwise it's an error.

assert!(parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err());

pub fn and_time(&self, time: NaiveTime) -> NaiveDateTime[src]

Makes a new NaiveDateTime from the current date and given NaiveTime.

Example

use chrono::{NaiveDate, NaiveTime, NaiveDateTime};

let d = NaiveDate::from_ymd(2015, 6, 3);
let t = NaiveTime::from_hms_milli(12, 34, 56, 789);

let dt: NaiveDateTime = d.and_time(t);
assert_eq!(dt.date(), d);
assert_eq!(dt.time(), t);

pub fn and_hms(&self, hour: u32, min: u32, sec: u32) -> NaiveDateTime[src]

Makes a new NaiveDateTime from the current date, hour, minute and second.

No leap second is allowed here; use NaiveDate::and_hms_* methods with a subsecond parameter instead.

Panics on invalid hour, minute and/or second.

Example

use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday};

let d = NaiveDate::from_ymd(2015, 6, 3);

let dt: NaiveDateTime = d.and_hms(12, 34, 56);
assert_eq!(dt.year(), 2015);
assert_eq!(dt.weekday(), Weekday::Wed);
assert_eq!(dt.second(), 56);

pub fn and_hms_opt(
    &self,
    hour: u32,
    min: u32,
    sec: u32
) -> Option<NaiveDateTime>
[src]

Makes a new NaiveDateTime from the current date, hour, minute and second.

No leap second is allowed here; use NaiveDate::and_hms_*_opt methods with a subsecond parameter instead.

Returns None on invalid hour, minute and/or second.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 6, 3);
assert!(d.and_hms_opt(12, 34, 56).is_some());
assert!(d.and_hms_opt(12, 34, 60).is_none()); // use `and_hms_milli_opt` instead
assert!(d.and_hms_opt(12, 60, 56).is_none());
assert!(d.and_hms_opt(24, 34, 56).is_none());

pub fn and_hms_milli(
    &self,
    hour: u32,
    min: u32,
    sec: u32,
    milli: u32
) -> NaiveDateTime
[src]

Makes a new NaiveDateTime from the current date, hour, minute, second and millisecond.

The millisecond part can exceed 1,000 in order to represent the leap second.

Panics on invalid hour, minute, second and/or millisecond.

Example

use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday};

let d = NaiveDate::from_ymd(2015, 6, 3);

let dt: NaiveDateTime = d.and_hms_milli(12, 34, 56, 789);
assert_eq!(dt.year(), 2015);
assert_eq!(dt.weekday(), Weekday::Wed);
assert_eq!(dt.second(), 56);
assert_eq!(dt.nanosecond(), 789_000_000);

pub fn and_hms_milli_opt(
    &self,
    hour: u32,
    min: u32,
    sec: u32,
    milli: u32
) -> Option<NaiveDateTime>
[src]

Makes a new NaiveDateTime from the current date, hour, minute, second and millisecond.

The millisecond part can exceed 1,000 in order to represent the leap second.

Returns None on invalid hour, minute, second and/or millisecond.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 6, 3);
assert!(d.and_hms_milli_opt(12, 34, 56,   789).is_some());
assert!(d.and_hms_milli_opt(12, 34, 59, 1_789).is_some()); // leap second
assert!(d.and_hms_milli_opt(12, 34, 59, 2_789).is_none());
assert!(d.and_hms_milli_opt(12, 34, 60,   789).is_none());
assert!(d.and_hms_milli_opt(12, 60, 56,   789).is_none());
assert!(d.and_hms_milli_opt(24, 34, 56,   789).is_none());

pub fn and_hms_micro(
    &self,
    hour: u32,
    min: u32,
    sec: u32,
    micro: u32
) -> NaiveDateTime
[src]

Makes a new NaiveDateTime from the current date, hour, minute, second and microsecond.

The microsecond part can exceed 1,000,000 in order to represent the leap second.

Panics on invalid hour, minute, second and/or microsecond.

Example

use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday};

let d = NaiveDate::from_ymd(2015, 6, 3);

let dt: NaiveDateTime = d.and_hms_micro(12, 34, 56, 789_012);
assert_eq!(dt.year(), 2015);
assert_eq!(dt.weekday(), Weekday::Wed);
assert_eq!(dt.second(), 56);
assert_eq!(dt.nanosecond(), 789_012_000);

pub fn and_hms_micro_opt(
    &self,
    hour: u32,
    min: u32,
    sec: u32,
    micro: u32
) -> Option<NaiveDateTime>
[src]

Makes a new NaiveDateTime from the current date, hour, minute, second and microsecond.

The microsecond part can exceed 1,000,000 in order to represent the leap second.

Returns None on invalid hour, minute, second and/or microsecond.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 6, 3);
assert!(d.and_hms_micro_opt(12, 34, 56,   789_012).is_some());
assert!(d.and_hms_micro_opt(12, 34, 59, 1_789_012).is_some()); // leap second
assert!(d.and_hms_micro_opt(12, 34, 59, 2_789_012).is_none());
assert!(d.and_hms_micro_opt(12, 34, 60,   789_012).is_none());
assert!(d.and_hms_micro_opt(12, 60, 56,   789_012).is_none());
assert!(d.and_hms_micro_opt(24, 34, 56,   789_012).is_none());

pub fn and_hms_nano(
    &self,
    hour: u32,
    min: u32,
    sec: u32,
    nano: u32
) -> NaiveDateTime
[src]

Makes a new NaiveDateTime from the current date, hour, minute, second and nanosecond.

The nanosecond part can exceed 1,000,000,000 in order to represent the leap second.

Panics on invalid hour, minute, second and/or nanosecond.

Example

use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday};

let d = NaiveDate::from_ymd(2015, 6, 3);

let dt: NaiveDateTime = d.and_hms_nano(12, 34, 56, 789_012_345);
assert_eq!(dt.year(), 2015);
assert_eq!(dt.weekday(), Weekday::Wed);
assert_eq!(dt.second(), 56);
assert_eq!(dt.nanosecond(), 789_012_345);

pub fn and_hms_nano_opt(
    &self,
    hour: u32,
    min: u32,
    sec: u32,
    nano: u32
) -> Option<NaiveDateTime>
[src]

Makes a new NaiveDateTime from the current date, hour, minute, second and nanosecond.

The nanosecond part can exceed 1,000,000,000 in order to represent the leap second.

Returns None on invalid hour, minute, second and/or nanosecond.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 6, 3);
assert!(d.and_hms_nano_opt(12, 34, 56,   789_012_345).is_some());
assert!(d.and_hms_nano_opt(12, 34, 59, 1_789_012_345).is_some()); // leap second
assert!(d.and_hms_nano_opt(12, 34, 59, 2_789_012_345).is_none());
assert!(d.and_hms_nano_opt(12, 34, 60,   789_012_345).is_none());
assert!(d.and_hms_nano_opt(12, 60, 56,   789_012_345).is_none());
assert!(d.and_hms_nano_opt(24, 34, 56,   789_012_345).is_none());

pub fn succ(&self) -> NaiveDate[src]

Makes a new NaiveDate for the next calendar date.

Panics when self is the last representable date.

Example

use chrono::NaiveDate;

assert_eq!(NaiveDate::from_ymd(2015,  6,  3).succ(), NaiveDate::from_ymd(2015, 6, 4));
assert_eq!(NaiveDate::from_ymd(2015,  6, 30).succ(), NaiveDate::from_ymd(2015, 7, 1));
assert_eq!(NaiveDate::from_ymd(2015, 12, 31).succ(), NaiveDate::from_ymd(2016, 1, 1));

pub fn succ_opt(&self) -> Option<NaiveDate>[src]

Makes a new NaiveDate for the next calendar date.

Returns None when self is the last representable date.

Example

use chrono::NaiveDate;
use chrono::naive::MAX_DATE;

assert_eq!(NaiveDate::from_ymd(2015, 6, 3).succ_opt(),
           Some(NaiveDate::from_ymd(2015, 6, 4)));
assert_eq!(MAX_DATE.succ_opt(), None);

pub fn pred(&self) -> NaiveDate[src]

Makes a new NaiveDate for the previous calendar date.

Panics when self is the first representable date.

Example

use chrono::NaiveDate;

assert_eq!(NaiveDate::from_ymd(2015, 6, 3).pred(), NaiveDate::from_ymd(2015,  6,  2));
assert_eq!(NaiveDate::from_ymd(2015, 6, 1).pred(), NaiveDate::from_ymd(2015,  5, 31));
assert_eq!(NaiveDate::from_ymd(2015, 1, 1).pred(), NaiveDate::from_ymd(2014, 12, 31));

pub fn pred_opt(&self) -> Option<NaiveDate>[src]

Makes a new NaiveDate for the previous calendar date.

Returns None when self is the first representable date.

Example

use chrono::NaiveDate;
use chrono::naive::MIN_DATE;

assert_eq!(NaiveDate::from_ymd(2015, 6, 3).pred_opt(),
           Some(NaiveDate::from_ymd(2015, 6, 2)));
assert_eq!(MIN_DATE.pred_opt(), None);

pub fn checked_add_signed(self, rhs: OldDuration) -> Option<NaiveDate>[src]

Adds the days part of given Duration to the current date.

Returns None when it will result in overflow.

Example

use chrono::NaiveDate;
use chrono::naive::MAX_DATE;
use time::Duration;

let d = NaiveDate::from_ymd(2015, 9, 5);
assert_eq!(d.checked_add_signed(Duration::days(40)),
           Some(NaiveDate::from_ymd(2015, 10, 15)));
assert_eq!(d.checked_add_signed(Duration::days(-40)),
           Some(NaiveDate::from_ymd(2015, 7, 27)));
assert_eq!(d.checked_add_signed(Duration::days(1_000_000_000)), None);
assert_eq!(d.checked_add_signed(Duration::days(-1_000_000_000)), None);
assert_eq!(MAX_DATE.checked_add_signed(Duration::days(1)), None);

pub fn checked_sub_signed(self, rhs: OldDuration) -> Option<NaiveDate>[src]

Subtracts the days part of given Duration from the current date.

Returns None when it will result in overflow.

Example

use chrono::NaiveDate;
use chrono::naive::MIN_DATE;
use time::Duration;

let d = NaiveDate::from_ymd(2015, 9, 5);
assert_eq!(d.checked_sub_signed(Duration::days(40)),
           Some(NaiveDate::from_ymd(2015, 7, 27)));
assert_eq!(d.checked_sub_signed(Duration::days(-40)),
           Some(NaiveDate::from_ymd(2015, 10, 15)));
assert_eq!(d.checked_sub_signed(Duration::days(1_000_000_000)), None);
assert_eq!(d.checked_sub_signed(Duration::days(-1_000_000_000)), None);
assert_eq!(MIN_DATE.checked_sub_signed(Duration::days(1)), None);

pub fn signed_duration_since(self, rhs: NaiveDate) -> OldDuration[src]

Subtracts another NaiveDate from the current date. Returns a Duration of integral numbers.

This does not overflow or underflow at all, as all possible output fits in the range of Duration.

Example

use chrono::NaiveDate;
use time::Duration;

let from_ymd = NaiveDate::from_ymd;
let since = NaiveDate::signed_duration_since;

assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 1)), Duration::zero());
assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 12, 31)), Duration::days(1));
assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 2)), Duration::days(-1));
assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 9, 23)), Duration::days(100));
assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 1, 1)), Duration::days(365));
assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2010, 1, 1)), Duration::days(365*4 + 1));
assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(1614, 1, 1)), Duration::days(365*400 + 97));

pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I> where
    I: Iterator<Item = B> + Clone,
    B: Borrow<Item<'a>>, 
[src]

Formats the date with the specified formatting items. Otherwise it is same to the ordinary format method.

The Iterator of items should be Cloneable, since the resulting DelayedFormat value may be formatted multiple times.

Example

use chrono::NaiveDate;
use chrono::format::strftime::StrftimeItems;

let fmt = StrftimeItems::new("%Y-%m-%d");
let d = NaiveDate::from_ymd(2015, 9, 5);
assert_eq!(d.format_with_items(fmt.clone()).to_string(), "2015-09-05");
assert_eq!(d.format("%Y-%m-%d").to_string(),             "2015-09-05");

The resulting DelayedFormat can be formatted directly via the Display trait.

assert_eq!(format!("{}", d.format_with_items(fmt)), "2015-09-05");

pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat<StrftimeItems<'a>>[src]

Formats the date with the specified format string. See the format::strftime module on the supported escape sequences.

This returns a DelayedFormat, which gets converted to a string only when actual formatting happens. You may use the to_string method to get a String, or just feed it into print! and other formatting macros. (In this way it avoids the redundant memory allocation.)

A wrong format string does not issue an error immediately. Rather, converting or formatting the DelayedFormat fails. You are recommended to immediately use DelayedFormat for this reason.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 9, 5);
assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05");
assert_eq!(d.format("%A, %-d %B, %C%y").to_string(), "Saturday, 5 September, 2015");

The resulting DelayedFormat can be formatted directly via the Display trait.

assert_eq!(format!("{}", d.format("%Y-%m-%d")), "2015-09-05");
assert_eq!(format!("{}", d.format("%A, %-d %B, %C%y")), "Saturday, 5 September, 2015");

Trait Implementations

impl Datelike for NaiveDate[src]

fn year(&self) -> i32[src]

Returns the year number in the calendar date.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).year(), 2015);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).year(), -308); // 309 BCE

fn month(&self) -> u32[src]

Returns the month number starting from 1.

The return value ranges from 1 to 12.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).month(), 9);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).month(), 3);

fn month0(&self) -> u32[src]

Returns the month number starting from 0.

The return value ranges from 0 to 11.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).month0(), 8);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).month0(), 2);

fn day(&self) -> u32[src]

Returns the day of month starting from 1.

The return value ranges from 1 to 31. (The last day of month differs by months.)

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).day(), 8);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).day(), 14);

Combined with NaiveDate::pred, one can determine the number of days in a particular month. (Note that this panics when year is out of range.)

use chrono::{NaiveDate, Datelike};

fn ndays_in_month(year: i32, month: u32) -> u32 {
    // the first day of the next month...
    let (y, m) = if month == 12 { (year + 1, 1) } else { (year, month + 1) };
    let d = NaiveDate::from_ymd(y, m, 1);

    // ...is preceded by the last day of the original month
    d.pred().day()
}

assert_eq!(ndays_in_month(2015, 8), 31);
assert_eq!(ndays_in_month(2015, 9), 30);
assert_eq!(ndays_in_month(2015, 12), 31);
assert_eq!(ndays_in_month(2016, 2), 29);
assert_eq!(ndays_in_month(2017, 2), 28);

fn day0(&self) -> u32[src]

Returns the day of month starting from 0.

The return value ranges from 0 to 30. (The last day of month differs by months.)

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).day0(), 7);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).day0(), 13);

fn ordinal(&self) -> u32[src]

Returns the day of year starting from 1.

The return value ranges from 1 to 366. (The last day of year differs by years.)

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).ordinal(), 251);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).ordinal(), 74);

Combined with NaiveDate::pred, one can determine the number of days in a particular year. (Note that this panics when year is out of range.)

use chrono::{NaiveDate, Datelike};

fn ndays_in_year(year: i32) -> u32 {
    // the first day of the next year...
    let d = NaiveDate::from_ymd(year + 1, 1, 1);

    // ...is preceded by the last day of the original year
    d.pred().ordinal()
}

assert_eq!(ndays_in_year(2015), 365);
assert_eq!(ndays_in_year(2016), 366);
assert_eq!(ndays_in_year(2017), 365);
assert_eq!(ndays_in_year(2000), 366);
assert_eq!(ndays_in_year(2100), 365);

fn ordinal0(&self) -> u32[src]

Returns the day of year starting from 0.

The return value ranges from 0 to 365. (The last day of year differs by years.)

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).ordinal0(), 250);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).ordinal0(), 73);

fn weekday(&self) -> Weekday[src]

Returns the day of week.

Example

use chrono::{NaiveDate, Datelike, Weekday};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).weekday(), Weekday::Tue);
assert_eq!(NaiveDate::from_ymd(-308, 3, 14).weekday(), Weekday::Fri);

fn with_year(&self, year: i32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the year number changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_year(2016),
           Some(NaiveDate::from_ymd(2016, 9, 8)));
assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_year(-308),
           Some(NaiveDate::from_ymd(-308, 9, 8)));

A leap day (February 29) is a good example that this method can return None.

assert!(NaiveDate::from_ymd(2016, 2, 29).with_year(2015).is_none());
assert!(NaiveDate::from_ymd(2016, 2, 29).with_year(2020).is_some());

fn with_month(&self, month: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the month number (starting from 1) changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month(10),
           Some(NaiveDate::from_ymd(2015, 10, 8)));
assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month(13), None); // no month 13
assert_eq!(NaiveDate::from_ymd(2015, 9, 30).with_month(2), None); // no February 30

fn with_month0(&self, month0: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the month number (starting from 0) changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month0(9),
           Some(NaiveDate::from_ymd(2015, 10, 8)));
assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month0(12), None); // no month 13
assert_eq!(NaiveDate::from_ymd(2015, 9, 30).with_month0(1), None); // no February 30

fn with_day(&self, day: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the day of month (starting from 1) changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day(30),
           Some(NaiveDate::from_ymd(2015, 9, 30)));
assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day(31),
           None); // no September 31

fn with_day0(&self, day0: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the day of month (starting from 0) changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day0(29),
           Some(NaiveDate::from_ymd(2015, 9, 30)));
assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day0(30),
           None); // no September 31

fn with_ordinal(&self, ordinal: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the day of year (starting from 1) changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal(60),
           Some(NaiveDate::from_ymd(2015, 3, 1)));
assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal(366),
           None); // 2015 had only 365 days

assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal(60),
           Some(NaiveDate::from_ymd(2016, 2, 29)));
assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal(366),
           Some(NaiveDate::from_ymd(2016, 12, 31)));

fn with_ordinal0(&self, ordinal0: u32) -> Option<NaiveDate>[src]

Makes a new NaiveDate with the day of year (starting from 0) changed.

Returns None when the resulting NaiveDate would be invalid.

Example

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal0(59),
           Some(NaiveDate::from_ymd(2015, 3, 1)));
assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal0(365),
           None); // 2015 had only 365 days

assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal0(59),
           Some(NaiveDate::from_ymd(2016, 2, 29)));
assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal0(365),
           Some(NaiveDate::from_ymd(2016, 12, 31)));

impl Clone for NaiveDate[src]

impl Copy for NaiveDate[src]

impl Eq for NaiveDate[src]

impl Ord for NaiveDate[src]

impl PartialEq<NaiveDate> for NaiveDate[src]

impl PartialOrd<NaiveDate> for NaiveDate[src]

impl Display for NaiveDate[src]

The Display output of the naive date d is same to d.format("%Y-%m-%d").

The string printed can be readily parsed via the parse method on str.

Example

use chrono::NaiveDate;

assert_eq!(format!("{}", NaiveDate::from_ymd(2015,  9,  5)), "2015-09-05");
assert_eq!(format!("{}", NaiveDate::from_ymd(   0,  1,  1)), "0000-01-01");
assert_eq!(format!("{}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31");

ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE.

assert_eq!(format!("{}", NaiveDate::from_ymd(   -1,  1,  1)),  "-0001-01-01");
assert_eq!(format!("{}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31");

impl Debug for NaiveDate[src]

The Debug output of the naive date d is same to d.format("%Y-%m-%d").

The string printed can be readily parsed via the parse method on str.

Example

use chrono::NaiveDate;

assert_eq!(format!("{:?}", NaiveDate::from_ymd(2015,  9,  5)), "2015-09-05");
assert_eq!(format!("{:?}", NaiveDate::from_ymd(   0,  1,  1)), "0000-01-01");
assert_eq!(format!("{:?}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31");

ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE.

assert_eq!(format!("{:?}", NaiveDate::from_ymd(   -1,  1,  1)),  "-0001-01-01");
assert_eq!(format!("{:?}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31");

impl Sub<Duration> for NaiveDate[src]

A subtraction of Duration from NaiveDate discards the fractional days, rounding to the closest integral number of days towards Duration::zero(). It is same to the addition with a negated Duration.

Panics on underflow or overflow. Use NaiveDate::checked_sub_signed to detect that.

Example

use chrono::NaiveDate;
use time::Duration;

let from_ymd = NaiveDate::from_ymd;

assert_eq!(from_ymd(2014, 1, 1) - Duration::zero(),             from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(86399),     from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(-86399),    from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) - Duration::days(1),            from_ymd(2013, 12, 31));
assert_eq!(from_ymd(2014, 1, 1) - Duration::days(-1),           from_ymd(2014, 1, 2));
assert_eq!(from_ymd(2014, 1, 1) - Duration::days(364),          from_ymd(2013, 1, 2));
assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*4 + 1),    from_ymd(2010, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*400 + 97), from_ymd(1614, 1, 1));

type Output = NaiveDate

The resulting type after applying the - operator.

impl Sub<NaiveDate> for NaiveDate[src]

Subtracts another NaiveDate from the current date. Returns a Duration of integral numbers.

This does not overflow or underflow at all, as all possible output fits in the range of Duration.

The implementation is a wrapper around NaiveDate::signed_duration_since.

Example

use chrono::NaiveDate;
use time::Duration;

let from_ymd = NaiveDate::from_ymd;

assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 1), Duration::zero());
assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 12, 31), Duration::days(1));
assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 2), Duration::days(-1));
assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 9, 23), Duration::days(100));
assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 1, 1), Duration::days(365));
assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2010, 1, 1), Duration::days(365*4 + 1));
assert_eq!(from_ymd(2014, 1, 1) - from_ymd(1614, 1, 1), Duration::days(365*400 + 97));

type Output = OldDuration

The resulting type after applying the - operator.

impl FromStr for NaiveDate[src]

Parsing a str into a NaiveDate uses the same format, %Y-%m-%d, as in Debug and Display.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 9, 18);
assert_eq!("2015-09-18".parse::<NaiveDate>(), Ok(d));

let d = NaiveDate::from_ymd(12345, 6, 7);
assert_eq!("+12345-6-7".parse::<NaiveDate>(), Ok(d));

assert!("foo".parse::<NaiveDate>().is_err());

type Err = ParseError

The associated error which can be returned from parsing.

impl Add<Duration> for NaiveDate[src]

An addition of Duration to NaiveDate discards the fractional days, rounding to the closest integral number of days towards Duration::zero().

Panics on underflow or overflow. Use NaiveDate::checked_add_signed to detect that.

Example

use chrono::NaiveDate;
use time::Duration;

let from_ymd = NaiveDate::from_ymd;

assert_eq!(from_ymd(2014, 1, 1) + Duration::zero(),             from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(86399),     from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(-86399),    from_ymd(2014, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) + Duration::days(1),            from_ymd(2014, 1, 2));
assert_eq!(from_ymd(2014, 1, 1) + Duration::days(-1),           from_ymd(2013, 12, 31));
assert_eq!(from_ymd(2014, 1, 1) + Duration::days(364),          from_ymd(2014, 12, 31));
assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*4 + 1),    from_ymd(2018, 1, 1));
assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*400 + 97), from_ymd(2414, 1, 1));

type Output = NaiveDate

The resulting type after applying the + operator.

impl AddAssign<Duration> for NaiveDate[src]

impl SubAssign<Duration> for NaiveDate[src]

impl Hash for NaiveDate[src]

impl StructuralPartialEq for NaiveDate[src]

impl StructuralEq for NaiveDate[src]

Auto Trait Implementations

impl Send for NaiveDate

impl Sync for NaiveDate

impl Unpin for NaiveDate

impl UnwindSafe for NaiveDate

impl RefUnwindSafe for NaiveDate

Blanket Implementations

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> From<T> for T[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T> ToString for T where
    T: Display + ?Sized
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> Any for T where
    T: 'static + ?Sized
[src]