LoyaltyLobby reports that the Hilton Q4 promotion for 2013 will be from 10th October 2013 to 31st January 2014.
It will run a bit longer than the recent quarterly promotions, continuing until the end of January.
LoyaltyLobby says "You earn regular points (no bonuses) for one night stays, double points for stays of two nights, triple points for stays of three nights, and quadruple points for stays of four nights or longer".
Probably good for those who stay in the same place for a few days.
LoyaltyLobby link: Hilton HHonors