What time is it in Aqtau?

Kazakhstan spans 7 time zones, so the answer depends on where in it you mean. Aqtau covers mangghystau/mankistau and is on the same clock as Almaty, though the two are separate zones in the IANA database and can diverge when daylight saving rules differ.

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