impl Weekday

const fn succ(&self) -> Weekday

The next day in the week.

w:	Mon	Tue	Wed	Thu	Fri	Sat	Sun
w.succ():	Tue	Wed	Thu	Fri	Sat	Sun	Mon

const fn pred(&self) -> Weekday

The previous day in the week.

w:	Mon	Tue	Wed	Thu	Fri	Sat	Sun
w.pred():	Sun	Mon	Tue	Wed	Thu	Fri	Sat

const fn number_from_monday(&self) -> u32

Returns a day-of-week number starting from Monday = 1. (ISO 8601 weekday number)

w:	Mon	Tue	Wed	Thu	Fri	Sat	Sun
w.number_from_monday():	1	2	3	4	5	6	7

const fn number_from_sunday(&self) -> u32

Returns a day-of-week number starting from Sunday = 1.

w:	Mon	Tue	Wed	Thu	Fri	Sat	Sun
w.number_from_sunday():	2	3	4	5	6	7	1

const fn num_days_from_monday(&self) -> u32

Returns a day-of-week number starting from Monday = 0.

w:	Mon	Tue	Wed	Thu	Fri	Sat	Sun
w.num_days_from_monday():	0	1	2	3	4	5	6

Example

# #[cfg(feature = "clock")] {
# use chrono::{Local, Datelike};
// MTWRFSU is occasionally used as a single-letter abbreviation of the weekdays.
// Use `num_days_from_monday` to index into the array.
const MTWRFSU: [char; 7] = ['M', 'T', 'W', 'R', 'F', 'S', 'U'];

let today = Local::now().weekday();
println!("{}", MTWRFSU[today.num_days_from_monday() as usize]);
# }

const fn num_days_from_sunday(&self) -> u32

Returns a day-of-week number starting from Sunday = 0.

w:	Mon	Tue	Wed	Thu	Fri	Sat	Sun
w.num_days_from_sunday():	1	2	3	4	5	6	0

const fn days_since(&self, other: Weekday) -> u32

The number of days since the given day.

Examples

use chrono::Weekday::*;
assert_eq!(Mon.days_since(Mon), 0);
assert_eq!(Sun.days_since(Tue), 5);
assert_eq!(Wed.days_since(Sun), 3);