http://www.lasvegasadvisor.com/greatdeals-slotpromotions.cfm
Palms Jan: 10x slots/6x vp Jan. 4, 11 & 18, 25-27 and all Thursdays.
I believe that only the Thursday point multipliers are open to the public at the Palms this month. It appears that the multipliers on Wednesdays and Friday 1/27 are only available to those who got a January mailer.
I tested it yesterday (Wednesday 1/11) with a person who did not get the Palms January mailer and he did not have that day's multiplier. Also only the Thursday multipliers are being advertised in the casino.