30
It's MAR10 day!
(fedia.io)
This originates from Teletext, where 10th March looked like MAR10.
Image source: https://www.superpage58.com/digitiser-vault-teletext-screenshot-image-archive-1993-01-01.htm
Paul Rose and Paul Gannon are doing Digitiser Level 2 at the moment, might be your thing
Unless it's the quiz element that you like - didn't they do an app in the early days of Android and iOS for that?