Time Functions for Mocha

integer mud_year ();: Returns the mud year.
integer mud_month ();: Returns the mud month, a number from 1 to 12.
integer mud_day ();: Returns the mud day, a number from 1 to 30.
integer mud_hour ();: Returns the mud hour, a number from 0 to 23.
boolean is_night ();: Returns true at night and false during the mud daylight hours.