Personally I think we should start Sundays PUG 2 hours earlier mainly because it would not end too late for Eastern European time (GMT +2; PUG would start 19:00 [7pm]) and it fits other time zones as well.
In UK the PUG would start 17:00 (GMT 0; 5 pm), most people should be home by then, what else are you going to do on a Sunday.
On the continent of America the PUG would start 11:00 (GMT -6, Central standard time; 11am), not too early and also not in the middle of the day.
For India the PUG would start 22:30 (GMT +5:30; 10:30 pm), better then 00:30.
And for New Zealand as said before it would start 06:00 on Monday (GMT +13; 6am), just enough time to play a round of PUG before work or school.
Only bad timing I see is Japan, the PUG would start there 02:00 (GMT +9; 2am), not that the start time now, 04:00 is much better.
I would like to hear one good reason on a vote of NO on this topic, a good reason will change my mind. This all is assuming that the moderators would even approve of a earlier Sunday PUG.