Hey,
i have a similar setup , not sure if this helps , but check this thread https://groups.google.com/g/tiddlywiki/c/uB1RxGj2qz0/m/QYjk6VO_AwAJ?hl=en
for adding a day , i don’t know how to do it , however i got help to add an hour in this thread https://groups.google.com/g/tiddlywiki/c/OUJlcbbK5v0/m/Wpc2SWMWAgAJ?hl=en … i think it will probably be easy to modify the 1 hour value to 24 to achieve what you want