Talk:Shadow Play - Part 2/@comment-1031724-20180515201251/@comment-7345250-20180911193110

One, Celestia and Nightmare Moon battled at night. Two, Celestia was ill-suited to celebrate after the battle. Three, the most specific time window we have for the first celebration is the same year.

In any case, you are the one assuming they are the same day. The burden of proof is on you.