In a similar vein different people in Xinjiang in China observe entirely different timezones - Han Chinese observe Beijing time (because China is insane and uses one timezone despite spanning 5), while Uyghurs observe a local time 2 hours behind.
It’s a small show of resistance, which is sometimes all a people have if they have limited control of their own affairs.
In Palestine, this depends on my OS vendor managing to update the tz database in the short window before the official announcement and the decision coming into force. (I believe the tz database makes some assumptions based on past performance, but the government can change their mind any year.) If my OS does not update, I need to change my time zone manually to something that has the right UTC offset, and then I need to manually change back in the autumn, and I can never be 100% sure if any given computer shows the official time.