The revival gacha says it will run between events. The gacha ends on the 9th. Therefore, you can assume that the event either begins on the 9th (as the gacha ends) or on the 10th.
The revival gacha says it will run between events. The gacha ends on the 9th. Therefore, you can assume that the event either begins on the 9th (as the gacha ends) or on the 10th.