Today I was talking to a friend and he said that each quality for socketing is on different days. I asked him and he said uni socketing is on mondays and fridays. Elite and super socketing is on saturdays and sundays. And normal quality items is on tuesdays and thursday. I was on my water and before maintenance I upgraded my *uni* bag and it socketed along with my *uni* tao cap both lvl 52-67 for bag and my hat to lvl 67 both in market. Also the time was around 7:30 at night so I think that is a good time for socketing uni items because both of my uni bag and hat were socketed at the same time.