If an event is less than one year old from this calendar year (thanks quid!), the year is not written. I recognize that this is not a convention that is immediately unambiguous to new users. Perhaps we can add a feature request to make everything ISO 8601-compliant.
We could be a little more descriptive in the post history table when it comes to these edge cases, it's just that they rarely come up and get noticed.
Here's the chain of events:
5 Close votes accumulate, 4 sending it to math.stackexchange
Post is closed and locked for migration
Problem with tags not existing on the destination site, migration rejected
It was a caching issue. When a tag is first created on a site (especially by means like an automated system, such as what generated the announcement for the election), the process for categorizing tags may not have caught up. election was in a similar boat at first, but because I posted the Election Q&A with the tag, it then realized it is indeed a real ...
It's cleverly hidden under the Stack Exchange logo drop-down on the right-hand side of the top bar (NOT the one on the left-hand side of the top bar):
Alternately, you can just type "meta." in the title bar after placing the cursor in front of the normal site's URL; in some cases this can be faster.