At the current time, all Regional Sieges have a siegable timeframe between 19:00-21:00 or 21:00-23:00 + 00:00 UTC, which means that for the average American player, the range of time is between 13:00-15:00 or 15:00-17:00 taking Chicago as an example, while for an average Asian/Australian player, the period is around 3:00-5:00 or 5:00- 7:00 of the next day with Shanghai as an example city. This shows that Asian players are usually the most negatively affected in region sieges. So I suggest a rework of the timeframes to allow for a better balanced gameplay for all players from different regions of the world, as following:

- Each regional siege will still have "two and only two day" when it could be besieged;
- The timeframe for each day of a regional siege would rotate between 3 possible options, 18:00-20:00 UTC for most European and some American Players, 10:00-12:00 UTC (or 18:00-20:00 UTC+8) for Asian players and 02:00-04:00 UTC of the following day (18:00-20:00 UTC-8) for most American players.
- Within the completion of the second week rotations, all 3 different timeframe have necessarily needed be picked at least once. This doesn't mean that one of the timeframes can have both their "turns" before another timeframe has one picked.

Simple Example of Regional Siege Timeframe Cycle:
https://discordapp.com/channels/184403250609520641/733052403389300738/1005145269152788702