Why does time run back on my Huawei Honor 3C?

i have honor h30-l02 if i set time after some hours it gone wrong for an example if i set 11:00 o'clock after some hours it shows 9:30 or less (the time run back) how can i solve this?

all i set was correct but it not solved

Well, that's odd. Can you check the time settings and reset everything. Make sure you enter correct time, date, and timezone.

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