According to what was declared by the developers, the game servers will be shut down at 23:00 Italian on the evening of next Wednesday, February 3, 2021 and should be back in operation no later than 4:00 am on 4 February 2021. This means that the maximum maintenance duration will be five hours, but it is likely that MiHoYo will manage to surprise us once again and we will be able to play after a few minutes. In any case, there will be positive implications, since also for the next maintenance there is a prize of 60 Primogems free for each hour during which the servers will remain offline, with the possibility therefore of obtaining a maximum of 300 Primogems (provided that you have already reached Adventurer Level 5).
Don't forget that for the first time ever it will be possible to preload an update of Genshin Impact thanks to the upcoming patch for the PC, Android and iOS client in the course of the day tomorrow. In case you usually play on PS4 or PS5, to update you will have to manually search for a new version of the game from the Sony console after maintenance is complete.