Hilton is offering a special 24 hour promotion, that began today at 11:00 a.m. ET and ends at 10:59 a.m. ET May 24th. To earn the 2,500 bonus points you need to book a stay between May 23 and September 30, 2013 at any hotel within the Hilton HHonors portfolio. You then need to enter your reservation confirmation number, HHonors number, and required information via a special link on the Hilton HHonors Facebook page (you’ll need to like them first). Only the first 4,000 Hilton HHonors members to book and register receive the bonus points.