Edit: it is indeed Iran, except that it is now fixed relative to the Islamic lunar calendar (so updates can be pushed as soon as Iran declares what is the date

Edit: it is indeed Iran, except that it is now fixed relative to the Islamic lunar calendar (so updates can be pushed as soon as Iran declares what is the date corresponding to the Gregorian calendar: https://en.wikipedia.org/wiki/Iran_Standard_Time https://en.wikipedia.org/wiki/Iran_Standard_Time). Nope, it happens about quarterly because no-one can predict the moon and the cloud cover with such precision (I believe it's Iran, but I might be wrong and it might be another Arab country) among other things.