Usually on the dates of the flier, but RCI could very well say the sale is "sold out" and won't honor the price.
Damn, I must have been super unclear, lol. I know it starts on the dates of the flier. I was asking it if was midnight or whatever.
Anyway, it's all good, I booked the one I wanted last week on Wednesday morning. It's $5/pp more this week, woohoo! 😁