WG quests reset on Tuesday after maintenance AND four days after you turn in the quest. Contrary to popular belief (and contrary to the blue posts announcing these changes), they are not on a 7 day reset timer. Thus, you can do the quests twice per week.
This makes sense, as it brings the rewards in-line with what was previously available before the reset timer was put in place to lessen WG lag (20 shards per quest vs. 21 shards, 7446 honor vs. 8,750). In my opinion, this is actually a slight buff for people grinding honor and tokens, since it is far easier to do these quests twice a week, as opposed having to do them every day of the week. If you even missed one of the seven days under the old system, you're probably better off under the new system (20 shards and 7446 honor vs. 18 shards and 7500 honor).
At any rate, if you first do the quests on the date listed below, you can do them again on the day subsequently listed:
Tuesday -> Saturday
Wednesday -> Sunday
Thursday -> Monday
Friday -> Tuesday
Saturday -> Tuesday
Sunday -> Tuesday
Monday -> Tuesday
I hope this helps clear up the confusion.