`method parse : js_string t -> number_t meth`
`method _UTC_month : int -> int -> number_t meth`
`method _UTC_day : int -> int -> number_t meth`
`method _UTC_hour : int -> int -> int -> int -> number_t meth`
`method _UTC_min : int -> int -> int -> int -> int -> number_t meth`
`method _UTC_sec : int -> int -> int -> int -> int -> int -> number_t meth`
`method _UTC_ms : int -> int -> int -> int -> int -> int -> int -> number_t meth`
`method now : number_t meth`