Originally Posted by
ennsy
115 nights in 2017, got Platinum 2018 and 20 rollover nights. Credit card nights have not yet posted.
So is it half your total rollover nights that get posted for 2018? Anyone know the exact calculation Marriott is using?
The formula is posted at the top of this wiki thread. Likely you had rollover nights from 2016 that rolled into 2017, and those were (and always have been) backed out prior to arriving at your 2017 tally rolling into 2018. I'd bet you had 20 rollover nights starting 2017 - there's no "halving" type of calculus going on in the background.