Are you staying onsite or offsite? If you are offsite, you can make reservations 60 days before the date you want to dine, which I think would be January 22 for March 23? If you're onsite, you can make reservations 60 days before your check-in date, but only for the first ten days of your stay. I think 60 days before March 13 would be January 12, so you can reserve March 23 then (you can reserve 60+10) and March 24 on January 13. I might be off by a day or two though!