Hilton has just opened registration for their third quarter promotion, valid for stays between July 9 and September 30, 2013. Through this promotion, HHonors members that register prior to check-out earn double base HHonors points on stays Monday through Thursday nights, while they earn triple base HHonors points on stays Friday through Sunday nights.
If you’re staying over a mix of dates eligible for different bonuses, the average nightly rate will be used and bonus points will be allocated accordingly, which usually works out in your favor since weekday rates are typically higher than weekend rates.
Unfortunately there are over 600 hotels that opted out of the promotion, which really is damn embarrassing, in my opinion. Almost like SkyTeam, where you can’t even accrue Delta SkyMiles MQMs for travel on Korean Air that’s booked directly through them.