I have also run into some issues with dates. Most recently I was cleaning up a 72-hour broadcast, and since it spans 3 days I did ask how this date should be represented.
However, I think we should separate these into a Date Guideline and Location Guideline. Even though they are often used together, they are not dependent on each other. The we could express “Date: Location” etc in guidelines with links to each.
On the topic of dates though, I don’t really have any strong opinions about how we should handle non-specific dates (like whole months), multiple/ranges of dates, etc. I’m happy to open a separate thread for that soon with some ideas.