180 days before 6/25 (so around 12/25 -- but I think there is a caculator -- maybe on wdwinfo.com? -- that can help you figure out that exact date). If you're staying on property you can make reservations at 180 days prior to 6/25, plus up to the 10 additional days that follow 6/25; however, if you're staying off-site, it has to be at the 180 day mark for each day. Hope I explained that correctly/clearly!