Date and time handling for Rust.
```rust // find out if the doomsday rule is correct! use chrono::{Weekday, NaiveDate, naive}; use std::iter::range_inclusive;
for y in rangeinclusive(naive::date::MIN.year(), naive::date::MAX.year()) { // even months let d4 = NaiveDate::fromymd(y, 4, 4); let d6 = NaiveDate::fromymd(y, 6, 6); let d8 = NaiveDate::fromymd(y, 8, 8); let d10 = NaiveDate::fromymd(y, 10, 10); let d12 = NaiveDate::fromymd(y, 12, 12);
// nine to five, seven-eleven
let d59 = NaiveDate::from_ymd(y, 5, 9);
let d95 = NaiveDate::from_ymd(y, 9, 5);
let d711 = NaiveDate::from_ymd(y, 7, 11);
let d117 = NaiveDate::from_ymd(y, 11, 7);
// "March 0"
let d30 = NaiveDate::from_ymd(y, 3, 1).pred();
let weekday = d30.weekday();
let other_dates = [d4, d6, d8, d10, d12, d59, d95, d711, d117];
assert!(other_dates.iter().all(|d| d.weekday() == weekday));
} ```