Personally I like the "aa" notation. Much more expandable, takes a lot longer to run out of unique suffixes.
I know. But it would be nice ever once and a while. Problem is I usually miss at least half the first day, because I usually work my morning stuff, than go to work and than I find out it has started in the afternoon when I check on my settlements.On the beta server, we almost never get an announcement before the release of an event. For once, we've known the release date for ages thanks to the mystery box but there's nothing new in not having an announcement.