Huawei
Set Time Manually auf Huawei
Huawei phones running EMUI pull the current time from your mobile network or a connected Wi-Fi access point by default. This keeps the clock accurate without input, but it also overwrites any custom time you set by hand, since the sync runs again after almost every reboot or signal change.
To lock in your own time, turn off the automatic sync first. Open Settings ➔ System & updates ➔ Date & time, then disable Set automatically. This stops EMUI from requesting the time from the carrier or a network time server.
With automatic sync off, tap Time, set the hour and minute you want, and confirm with OK. The phone keeps this value until you turn automatic sync back on or change it again yourself.
Manual time is useful for testing apps, working around a wrong network time server, or matching a clock that does not follow your local time zone rules. If the time still looks wrong afterward, check the time zone in the same menu, since date, time and zone are separate settings on EMUI.