Function koyomi::holiday

pub fn holiday(date: &Date) -> Option<String>

指定日が祝祭日にあたるかどうかを判定する

Examples

use koyomi;

let date = koyomi::Date::from_ymd(2018, 1, 1).unwrap();
let holiday = koyomi::holiday(&date);
assert_eq!(holiday.unwrap(), "元日");

let date = koyomi::Date::from_ymd(2018, 1, 2).unwrap();
let holiday = koyomi::holiday(&date);
assert_eq!(holiday, None);