Board Thread:General Discussion/@comment-26006155-20190617222636/@comment-38339538-20190713024000

The calendar in Toriel's house shows the beginning of 201X, so that would be the last date on the calendar before the move into New Home. We don't know definitively that the tape was recorded in New Home, just that it ended up there for Alphys to find the tapes. The very fact that there's a child's room in Toriels house at all proves Asriel once resided in Old Home.