Module Date.Period


module Period: sig  end

include S
val make : int -> int -> int -> Date.t
val lmake : ?year:int -> ?month:int -> ?day:int -> unit -> Date.t
val year : int -> Date.t
val month : int -> Date.t
val week : int -> Date.t
val day : int -> Date.t
exception Not_computable
val nb_days : Date.t -> int