Struct DateUtc 

pub struct DateUtc {
    pub inner: NaiveDate,
}

Fields

inner: NaiveDate

Implementations

impl DateUtc

pub fn now() -> DateUtc

Returns a [DateTime] which corresponds to the current date and time.

pub fn from_str(arg: &str) -> Result<DateUtc, Error>

create from str

Methods from Deref<Target = NaiveDate>

pub const MIN: NaiveDate

pub const MAX: NaiveDate

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

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

Example

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

let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap();
let t = NaiveTime::from_hms_milli_opt(12, 34, 56, 789).unwrap();

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

👎Deprecated since 0.4.23: use and_hms_opt() instead

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

Panics on invalid hour, minute and/or second.

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

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.

Errors

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

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap();
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

👎Deprecated since 0.4.23: use and_hms_milli_opt() instead

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

The millisecond part is allowed to exceed 1,000 in order to represent a leap second, but only when sec == 59.

Panics

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

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

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

The millisecond part is allowed to exceed 1,000 in order to represent a leap second, but only when sec == 59.

Errors

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

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap();
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

👎Deprecated since 0.4.23: use and_hms_micro_opt() instead

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

The microsecond part is allowed to exceed 1,000,000 in order to represent a leap second, but only when sec == 59.

Panics

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

Example

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

let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap();

let dt: NaiveDateTime = d.and_hms_micro_opt(12, 34, 56, 789_012).unwrap();
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>

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

The microsecond part is allowed to exceed 1,000,000 in order to represent a leap second, but only when sec == 59.

Errors

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

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap();
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

👎Deprecated since 0.4.23: use and_hms_nano_opt() instead

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

The nanosecond part is allowed to exceed 1,000,000,000 in order to represent a leap second, but only when sec == 59.

Panics

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

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

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

The nanosecond part is allowed to exceed 1,000,000,000 in order to represent a leap second, but only when sec == 59.

Errors

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

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap();
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

👎Deprecated since 0.4.23: use succ_opt() instead

Makes a new NaiveDate for the next calendar date.

Panics

Panics when self is the last representable date.

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

Makes a new NaiveDate for the next calendar date.

Errors

Returns None when self is the last representable date.

Example

use chrono::NaiveDate;

assert_eq!(
    NaiveDate::from_ymd_opt(2015, 6, 3).unwrap().succ_opt(),
    Some(NaiveDate::from_ymd_opt(2015, 6, 4).unwrap())
);
assert_eq!(NaiveDate::MAX.succ_opt(), None);

pub fn pred(&self) -> NaiveDate

👎Deprecated since 0.4.23: use pred_opt() instead

Makes a new NaiveDate for the previous calendar date.

Panics

Panics when self is the first representable date.

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

Makes a new NaiveDate for the previous calendar date.

Errors

Returns None when self is the first representable date.

Example

use chrono::NaiveDate;

assert_eq!(
    NaiveDate::from_ymd_opt(2015, 6, 3).unwrap().pred_opt(),
    Some(NaiveDate::from_ymd_opt(2015, 6, 2).unwrap())
);
assert_eq!(NaiveDate::MIN.pred_opt(), None);

pub fn years_since(&self, base: NaiveDate) -> Option<u32>

Returns the number of whole years from the given base until self.

Errors

Returns None if base > self.

pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I>

where I: Iterator<Item = B> + Clone, B: Borrow<Item<'a>>,

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

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

Example

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

let fmt = StrftimeItems::new("%Y-%m-%d");
let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap();
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>>

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.)

Panics

Converting or formatting the returned DelayedFormat panics if the format string is wrong. Because of this delayed failure, you are recommended to immediately use the DelayedFormat value.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap();
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");

pub fn iter_days(&self) -> NaiveDateDaysIterator

Returns an iterator that steps by days across all representable dates.

Example

let expected = [
    NaiveDate::from_ymd_opt(2016, 2, 27).unwrap(),
    NaiveDate::from_ymd_opt(2016, 2, 28).unwrap(),
    NaiveDate::from_ymd_opt(2016, 2, 29).unwrap(),
    NaiveDate::from_ymd_opt(2016, 3, 1).unwrap(),
];

let mut count = 0;
for (idx, d) in NaiveDate::from_ymd_opt(2016, 2, 27).unwrap().iter_days().take(4).enumerate() {
    assert_eq!(d, expected[idx]);
    count += 1;
}
assert_eq!(count, 4);

for d in NaiveDate::from_ymd_opt(2016, 3, 1).unwrap().iter_days().rev().take(4) {
    count -= 1;
    assert_eq!(d, expected[count]);
}

pub fn iter_weeks(&self) -> NaiveDateWeeksIterator

Returns an iterator that steps by weeks across all representable dates.

Example

let expected = [
    NaiveDate::from_ymd_opt(2016, 2, 27).unwrap(),
    NaiveDate::from_ymd_opt(2016, 3, 5).unwrap(),
    NaiveDate::from_ymd_opt(2016, 3, 12).unwrap(),
    NaiveDate::from_ymd_opt(2016, 3, 19).unwrap(),
];

let mut count = 0;
for (idx, d) in NaiveDate::from_ymd_opt(2016, 2, 27).unwrap().iter_weeks().take(4).enumerate() {
    assert_eq!(d, expected[idx]);
    count += 1;
}
assert_eq!(count, 4);

for d in NaiveDate::from_ymd_opt(2016, 3, 19).unwrap().iter_weeks().rev().take(4) {
    count -= 1;
    assert_eq!(d, expected[count]);
}

pub fn week(&self, start: Weekday) -> NaiveWeek

Returns the NaiveWeek that the date belongs to, starting with the Weekday specified.

pub fn leap_year(&self) -> bool

Returns true if this is a leap year.

assert_eq!(NaiveDate::from_ymd_opt(2000, 1, 1).unwrap().leap_year(), true);
assert_eq!(NaiveDate::from_ymd_opt(2001, 1, 1).unwrap().leap_year(), false);
assert_eq!(NaiveDate::from_ymd_opt(2002, 1, 1).unwrap().leap_year(), false);
assert_eq!(NaiveDate::from_ymd_opt(2003, 1, 1).unwrap().leap_year(), false);
assert_eq!(NaiveDate::from_ymd_opt(2004, 1, 1).unwrap().leap_year(), true);
assert_eq!(NaiveDate::from_ymd_opt(2100, 1, 1).unwrap().leap_year(), false);

pub fn to_epoch_days(&self) -> i32

Counts the days in the proleptic Gregorian calendar, with January 1, Year 1970 as day 0.

Example

use chrono::NaiveDate;

let from_ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap();

assert_eq!(from_ymd(1, 1, 1).to_epoch_days(), -719162);
assert_eq!(from_ymd(1970, 1, 1).to_epoch_days(), 0);
assert_eq!(from_ymd(2005, 9, 10).to_epoch_days(), 13036);

Trait Implementations

impl Clone for DateUtc

fn clone(&self) -> DateUtc

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DateUtc

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Deref for DateUtc

type Target = NaiveDate

The resulting type after dereferencing.

fn deref(&self) -> &<DateUtc as Deref>::Target

Dereferences the value.

impl DerefMut for DateUtc

fn deref_mut(&mut self) -> &mut <DateUtc as Deref>::Target

Mutably dereferences the value.

impl<'de> Deserialize<'de> for DateUtc

fn deserialize<D>( deserializer: D, ) -> Result<DateUtc, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DateUtc

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<&NaiveDate> for DateUtc

fn from(arg: &NaiveDate) -> DateUtc

Converts to this type from the input type.

impl From<NaiveDate> for DateUtc

fn from(arg: NaiveDate) -> DateUtc

Converts to this type from the input type.

impl Hash for DateUtc

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for DateUtc

fn cmp(&self, other: &DateUtc) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for DateUtc

fn eq(&self, other: &DateUtc) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for DateUtc

fn partial_cmp(&self, other: &DateUtc) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for DateUtc

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for DateUtc

impl Eq for DateUtc

impl StructuralPartialEq for DateUtc