`sig
type t = {
year : int;
month : int;
day : int;
hour : int;
minute : int;
second : int;
}
val utc_of_tai64 :
?wday:int Pervasives.ref ->
?yday:int Pervasives.ref -> Cf_tai64.t -> Cf_stdtime.t
val utc_to_tai64 :
year:int ->
month:int ->
day:int -> hour:int -> minute:int -> second:int -> Cf_tai64.t
val utc_to_tai64_unsafe :
year:int ->
month:int ->
day:int -> hour:int -> minute:int -> second:int -> Cf_tai64.t
end`