What time is it in Kwajalein?

Marshall Islands spans 2 time zones, so the answer depends on where in it you mean. Kwajalein covers kwajalein and is on the same clock as Majuro, though the two are separate zones in the IANA database and can diverge when daylight saving rules differ.

Kwajalein does not observe daylight saving, so its offset from UTC never moves. Its relationship to places that do change shifts twice a year instead.