On the upper left, click on "Make a Reservation". You will be asked to enter your date, time, and party size. Then click "Search for a Table". Even if there is no availability, the meal times will be listed on the subsequent page. For example, I checked on April 1 and it says "Lunch: 11:30AM-3:00PM (Does Not Include Characters)".
This is interesting b/c we were there in August and I'd heard that the latest lunch seating was 3pm; however, we had a 12:45p adr and by 1:30p the place had really cleared out and they weren't reseating any tables.