The Daily quest and Advent calendar reset at different times.
Daily quest = 11 pm CST
Advent calendar = 5pm or 6pm CST? (not sure but its around that time)
What time zone determines the end of a day?
You have to wait 24 hours to add again?
Because yesterday morning, I don't add a day in the calendar.
Yesterday afternoon, I don't add a day in the calendar.
But yes at night, and was with the same daily quest.
Now with other daily quest, i don't add again.