| 2024-07-03 17:09:36 | dipswitch | Added tag 'birthday' |
| 2024-07-03 17:09:33 | dipswitch | Removed tag 'birthtro' |
| 2023-03-06 17:51:54 | Niki | Added screenshot |
| 2023-03-06 17:43:00 | Niki | Added tag 'birthtro' |
| 2023-03-06 17:42:31 | Niki | Added tag 'zx81' |
| 2023-03-06 17:42:04 | Niki | Added credit for Niki on HAPPY BIRTHDAY ZX81: Code, Graphics |
| 2023-03-06 17:40:51 | Niki | Added screenshot |
| 2023-03-06 17:40:22 | Niki | Added production 'HAPPY BIRTHDAY ZX81' |