Because it's now March 14, which is 179 days from September 9th, and the restaurant typically is completely booked right at 180 days, if not before. Because of the 180 +10 rule, many people have to book it toward the end of their vacation. If you're onsite, look for a different date that's later in your vacation to see if there's availability. BOG is the hardest reservation to get right now...if you're not up at 6:00 a.m. ET booking it online, then chances are you missed your opportunity. Some people on the Restaurant board have said that BOG releases some reservations later and to keep checking back periodically.