Originally Posted by MIKESILV
Despite the advice given here, the "unofficial" rule is that it must be changed before midnight of the day you check out ( or is it check-in? ) either way you have passed that deadline.
Correct. The official rule is:
5. The Earnings Style Option in place for a Member as of 23:59:59 U.S. Central Standard Time on the day of check-out for a given stay will be the Option that governs earnings for that stay. No changes can be made retroactively for past stays.
http://hhonors.com/terms