Function chronoutil::delta::with_month

pub fn with_month<D: Datelike>(date: D, month: u32) -> Option<D>

Shift the date to have the given month. Returns None if the month is out of range.

Ambiguous month-ends are shifted backwards as necessary. For example:

let start = NaiveDate::from_ymd(2020, 1, 31);
assert_eq!(with_month(start, 2), Some(NaiveDate::from_ymd(2020, 2, 29)));
assert_eq!(with_month(start, 13), None);