Ton started writing Blender during the holidays of 1993. He found his earliest backups and based on their timestamps, he has announced Blender's birthday to be January 2nd. Next year, Blender will turn 20!
I’ve managed to find the oldest backup of Blender, a snapshot of the first code I wrote to start a new project to replace the in-house tool “Traces”.
This started in the Christmas / New Year holidays of 1993, and with the first code working around new-year’s day.
The backup is from January 8, 1994.