- style - mark visited sites
- allow retrieving past bulletins (e.g. n - 1)
- BUG: some feeds result in zero time, why (e.g. this https://ahelwer.ca/index.xml)
- BUG: reference day changes based on interval, clarify
- for feeds that are hard to parse, consider top-n feeds once a month. better than nothing. or reminders at the bottom of the bulletin.