Вы искали: gmt (Английский - Корейский)

gmt
그리니치 평균시

show gmt label
그리니치 평균시 라벨 보이기

show gmt instead of local time.
지방시 대신 평균시 보이기.

the time returned is localtime (and not gmt).
this function will return a unix timestamp corresponding to the julian day given in jday or false if jday is not inside the unix epoch (gregorian years between 1970 and 2037 or 2440588 = jday = 2465342)

identical to mktime() except the passed parameters represents a gmt date.
identical to mktime() except the passed parameters represents a gmt date.

for example, when run in eastern standard time (gmt -0500), the first line below prints "dec 31 1998 20:00:00", while the second prints "jan 01 1999 01:00:00 ".
behaves the same as strftime() except that the time returned is greenwich mean time (gmt). for example, when run in eastern standard time (gmt -0500), the first line below prints "dec 31 1998 20:00:00", while the second prints "jan 01 1999 01:00:00".