I know advance deposits have been triggering the credit from when the stay is booked. So even if you booked a stay for later in the year, it could trigger your credit now for the 1st half of year. I have already used my credit for the 1st half of the year and need to book a room in Vegas for one night in July. They require an advance deposit of the full cost of one night. It seems like that wouldn't trigger the 2nd half credit since the charge would hit my card now. Even though the stay is in the 2nd half of the year, which is the credit I would want to use... The split year credit is obviously new, but I suppose someone might have a similar situation before around their anniversary year timing.