can a different country have same timezone as rwanda and one day it doesn't
?
yes, it can happen, but only because governments can change their time zones, not because the Earth suddenly shifts.
time-zone change in history was done by human decision, not nature.
1. Samoa (2011)
They wanted better business with Australia and New Zealand, their main trading partners.
Result: they jumped forward and skipped an entire day.
Friday disappeared and Saturday arrived like a surprise guest.
2. Russia (multiple years)
Russia often changes time zones in different regions for political organization, energy use, and people’s comfort.
They once removed daylight saving time entirely, then brought it back in some places.
3. North Korea (2015, 2018)
They moved clocks back 30 minutes to create a “unique identity,” then reversed the change to match South Korea for political unity.
4. Egypt (several changes)
They kept switching daylight saving time on and off depending on energy issues and public opinion.
5. Turkey (2016)
They decided to stay in permanent UTC+3, mainly to have more daylight in the evening and to align better with business hours in the region.
6. South Sudan (2021)
Added an extra hour to better match daylight with people’s activities.
Why all this?
Governments change time to improve:
• business and trade
• energy usage
• political symbolism
• daily comfort for citizens
• synchronization with large partners
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