The recent contest often have strange time, what's the reason?

The old time of the next contest(9:05 at UTC+9) is good for me, why changed again?

The strange time will make our Asiatics can't do the contest. If you want me to get up at 4:35A.M for a contest? And chinese people to get up at 3:35 A.M for a contest?

14:35(UTC) is fit for most of people in the world(at least it's not too late), why change it often?

Please pardon my poor English.