civ14/Content.Server/Holiday/MonthEnum.cs

namespace Content.Server.Holiday
{
    public enum Month : byte
    {
        Invalid   = 0,
        January   = 1,
        February  = 2,
        March     = 3,
        April     = 4,
        May       = 5,
        June      = 6,
        July      = 7,
        August    = 8,
        September = 9,
        October   = 10,
        November  = 11,
        December  = 12
    }
}