Struct Date 

pub struct Date {
    pub year: i32,
    pub month: u32,
    pub day: u32,
}

A day of the proleptic Gregorian calendar. Months and days count from 1.

Fields

year: i32

month: u32

day: u32

Implementations

impl Date

pub const fn new(year: i32, month: u32, day: u32) -> Date

pub const fn is_leap_year(year: i32) -> bool

Whether year has a 29th of February.

pub const fn days_in_month(year: i32, month: u32) -> u32

The days in month of year.

pub const fn is_valid(self) -> bool

Whether the month is 1 to 12 and the day is in it.

pub fn today_utc() -> Date

Today in UTC. There is no time zone here: pass the local day to a picker when the difference matters.

pub fn today_local() -> Date

Today in the local zone, summer time included.

pub fn today_in(zone: &Zone) -> Date

Today in zone.

pub fn days(self) -> i64

Days since 1970-01-01 (negative before it).

pub fn from_days(days: i64) -> Date

The date days after 1970-01-01.

pub fn weekday(self) -> u32

The day of the week: 0 for Monday to 6 for Sunday.

pub fn add_days(self, days: i64) -> Date

The date days later (earlier if negative).

pub fn add_months(self, months: i32) -> Date

The same day months later (earlier if negative), or the last day of that month if it is shorter.

pub fn first_of_month(self) -> Date

The first day of its month.

pub fn last_of_month(self) -> Date

The last day of its month.

pub fn month_name(self) -> &'static str

The month’s name, in English.

pub const fn at(self, time: Time) -> DateTime

The day at time.

Trait Implementations

impl Clone for Date

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Date

impl Debug for Date

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

Formats the value using the given formatter.

impl Display for Date

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

2026-10-07.

impl Eq for Date

impl From<Date> for DateTime

fn from(date: Date) -> DateTime

The day at midnight.

impl FromStr for Date

fn from_str(text: &str) -> Result<Date, String>

YYYY-MM-DD (the year four digits, 0001 to 9999; the month and day may have one), or today (in UTC).

type Err = String

The associated error which can be returned from parsing.

impl Hash for Date

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

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 Date

fn cmp(&self, other: &Self) -> 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.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Date

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Date

fn partial_cmp(&self, other: &Self) -> 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 StructuralPartialEq for Date