I actually had to google this because my family never did a count up to 25, we always did a countdown to 1. I am shook and definitely will still be doing it in the reverse order. :o

EDIT: I just can't get over this discovery, lmao! When I was a kid we had a calendar thing we used every year and it definitely counted down and each night we would move the little snowflake a day closer to the 1 which represented Christmas. The other way makes sense in that it follows the calendar but! It's not a countdown! Why is my mind so blown over this?! XD