.Calendar: ClassType
.TextCalendar: ClassType
.HTMLCalendar: ClassType
.LocaleTextCalendar: ClassType
.LocaleHTMLCalendar: ClassType

.month: (theyear: Nat, themonth: Nat, w := Nat, l := Nat) -> Str
.calendar: (year: Nat, w := Nat, l := Nat, c := Nat, m := Nat) -> Str