"On This Day" filter

[mystery-house]

I'm trying out Memos as a replacement for the DayOne personal journaling app, and I'm really enjoying how clean and basic it is both in terms of UI and deployment.

A DayOne feature that I used a lot was the "On This Day" filter, which would display a list of entries filtered by the current month and date; so for example if today was 2024-09-01, clicking "On This Day" would show entries from 2024-09-01, 2023-09-01, 2023-09-01, et cetera.

I'm still getting acquainted with Memo's source code and APIs so I could be wrong here, but my sense is that implementing a feature like this efficiently would require adding some additional options to MemoFilter, something like display_time_month and display_time_day (and might as well add display_time_year too?) That way an 'On This Day' button could be easily added to the front-end using the month and day filters. (Alternately, I suppose display_time_before and display_time_after could be extended to accept multiple values, and the front-end would have to calculate and pass those timestamps for each day going back n years.

If a PR for this feature would be welcome I'd be willing to have a go at it.