pub const Month = enum(u4) {
    jan = 1,
    feb,
    mar,
    apr,
    may,
    jun,
    jul,
    aug,
    sep,
    oct,
    nov,
    dec,

    /// return the numeric calendar value for the given month
    /// i.e. jan=1, feb=2, etc
    pub fn numeric(self: Month) u4 {
        return @intFromEnum(self);
    }
}