Christmas morning. My family mailed me mine this year since I wasn't able to get home. I opened one on Christmas Eve like we did for Polyana, last night for us in Okinawa, and the rest in a little bit.
I used to hate getting up early on Christmas. My stepsister would wake me up at 0800 or earlier. The one year I'm not there my frigging body wakes up at 0730 when I could've slept until 1100 if I wanted.
When I was a kid my mom used to lock the door and wrap the presents so me and my brother couldn't snoop. We'd wait until she went to work and he showed me a little trick with a razor blade and peeling the tape to get an idea. Mom got wise and wrapped them twice with opposite ends having the tape so any major tampering was noticeable. Good times.