Calendar tab, and custom date fields

Hi!! I track a bunch of different dates for things like anniversaries (legal marriage vs. wedding vs. dating anniversary) and make excellent use of the birthday field, and when I met people It would be really cool to have some sort of calendar tab for important dates, listing birthdays and important anniversary events for the month (e.g. if you only have the month for when you met someone). I imagine something like a list, and a month calendar view! To do so, I'd imagine you have to be able to designate certain custom fields as "dates" so the formatting codes correctly to populate the calendar tab too. So I totally understand if you have to ship those features separately. Just the calendar first would be cool! The Feed is awesome for at a glance view on a timeline, but doesn't surface those yearly anniversaries except for on the day of. It would be neat to see those all at a glance visually on a calendar. Open to your suggestions as well if you have ideas! Thanks as always