There are some note-taking patterns, where a generic repeating date feature would be helpful.
Here are two use cases:
Use case 1: Birthdays
I would like to add the birthday of all the people I know to their page in Logseq (e.g with a property). Then I always see who has a birthday on the journal page.
Use Case 2: National Holidays
I could simply create a list of repeating national holidays that are always visible to me on the journal page as context.
I imagine something similar to the implementation where you just add +1y to the date and it repeats throughout the graph.