holiday
macro_rules! holiday_const { ($(#[$attr:meta])* $var:ident, $name:expr, $month:expr, $day:expr) => { ... }; ($(#[$attr:meta])* $var:ident, $name:expr, $nth:expr, $weekday:expr, $month:expr) => { ... }; }
Macro to create a pub const Holiday
pub const Holiday