The history site provides an overview of all changes that have been made on this omdb site.
| System | 2021-01-19 11:53 | changed external link to https://es.wikipedia.org/wiki/Treehouse_of_Horror_XXXI |
| Jo (contribs) | 2020-11-15 20:28 | Category Computer Animation |
| 2020-11-15 20:27 | Julia Prescott as Screenplay | |
| 2020-11-15 20:26 | changed Runtime from 0 to 22 | |
| 2020-11-15 20:24 | Category Halloween | |
| 2020-11-15 20:23 | Category Classical Animation | |
| System | 2020-11-13 21:25 | changed external link to https://en.wikipedia.org/wiki/Treehouse_of_Horror_XXXI |
| Jo (contribs) | 2020-11-01 12:29 | release date set to 2020-11-01 |
| Jo (contribs) | 2020-10-19 18:50 | changed Status from In Production to Released |
| Jo (contribs) | 2020-10-14 23:02 | Language English |
| System | 2020-10-14 08:19 | changed external link to https://fr.wikipedia.org/wiki/Simpson_Horror_Show_XXXI |
| 2020-10-06 21:11 | changed external link to https://www.imdb.com/title/tt13056368/ | |
| 2020-09-18 11:01 | Steven Dean Moore as Director | |
| changed external link to https://www.wikidata.org/wiki/Q98974444 | ||
| Jo (contribs) | 2020-09-18 11:00 | changed Status from Released to In Production |
| release date set to 2020-10-18 | ||
| created Treehouse of Horror XXXI |