Events that a source expects, grouped by the month, quarter or half-year the source names, with who expected each and when they said so.
Upcoming as of , the date this release was built (the newest input commit date), not today's date. An expected date is a statement by the source, not a result, and it can move. Dated events are on the timeline.
The calendar file has one all-day event for each upcoming item. Where a source gives only a month, a quarter, a half-year or a year, the event sits on the first day of that period and its title says "expected sometime in" the period.
The expected date has passed and no published record says the event happened. This does not mean it failed or was delayed: the atlas may not have checked the source since. Oldest first.