Hilton HHonors' first promo of 2015 - 2x points or 2x miles

Earlier this year, Hilton HHonors announced that they will no longer have multiple promotions during the year; instead, there will be 2 promotions for each year that will be global promotions (meaning, these won't be for specific geographies, though there could continue to be some non-participating properties for each promotion). The first of these promotions for 2015 has just been announced - Double Points or Miles.

It is quite simple really - you earn double points or double miles (your choice depending on your earnings style) for eligible stays between 1 March and 31 May 2015. You need to register for the promotion here. Also make sure that you choose your earnings preference carefully - once made, the choice cannot be revoked or changed for the duration of the promotion.

While the promo landing page has a link to non-participating hotels, there isn't anything listed on that page as of now. You could, however, keep checking here.

Also note, that unlike earlier promotions (which applied for your entire stay as long as you registered within the promotion period), this promotion will apply only for the nights covered during the promotion period. In a way, that's good because it means not having to necessarily reschedule hotel stays to fit in with the promotion. 

Here are the full T&Cs:

Offer valid for eligible stays completed between March 1 and May 31, 2015 ("Promotion Period") at any participating hotel in the Hilton Worldwide portfolio (click here for hotels that have chosen not to participate). Hilton HHonors™ members must first register at HHonors.com/Double prior to check-out of your first stay within the Promotion Period. Your selection of Double Points or Double Miles applies to all eligible stays completed during the Promotion Period at participating hotels and cannot be changed. Registered HHonors members will receive the selected bonus only for nights completed during the Promotion Period, regardless of a check-in date before the Promotion Period begins or a check-out date after the Promotion Period ends. If registering for Double Miles, you must select Points and Miles as your Double Dip™ Earning Style within your HHonors profile. "Double Points" means you will receive a bonus equal to the number of Base Points earned during a stay. Bonus Points earned on Base Points do not count toward tier qualification. Double Miles are available only with participating airlines. A preferred airline must be selected in your HHonors profile. Airline Miles accrued and awards issued are subject to the Terms and Conditions of each participating airline's reward program, as applicable. Certain airlines may not participate with the brand at which your stay is consumed. For details on the eligibility of your stay to earn miles, please click here.Please allow six to eight weeks from completion of your stay for points or miles to appear in your HHonors account. Offer is not transferable, is not valid for groups and cannot be combined with other select offers.