Function days_in_month 

pub fn days_in_month(year: i64, month: u32) -> u32

Number of days in month (1..=12) of year. A month outside 1..=12 reads as 30 rather than panicking.

use tilo_ui::date::days_in_month;
assert_eq!(days_in_month(2024, 2), 29);
assert_eq!(days_in_month(1900, 2), 28);
assert_eq!(days_in_month(2023, 12), 31);