I missed last year's Billy Joel concert at Wrigley Field, because I was at Detcon. When the Cubs announced their pre-sale for tickets for another
Billy Joel concert this year, I asked daisy_knotwise
if she wanted to go and, if not, if it was ok if I went by myself. Gretchen would rather not deal with the crowd, so was happy to let me go by myself.
When the pre-sale opened at 10 AM this morning, we were busy trying to help Julie extract a very
loose tooth that needed to come out before she went to school. So I ran in, ordered and paid for the tickets, and went back to tooth extraction.
It was somewhat later, after Gretchen had left to run an errand that I realized that the concert was on August 27th.
That would be our anniversary.
As we were discussing that we'd gotten it at Gen Con in 2001 when we'd gone up there in part to calibrate our first anniversary, we both nearly simultaneously realized that it was our 5th anniversary; and that we'd both forgotten in the business of a trip to the UK and a Worldcon (both the first long trip, and the first Worldcon with The Kid as well).
I don't think we've ever really forgotten an anniversary since - not that we've always done much on them - I know that for our 14th last year were getting ready to go to London, for example, and didn't do anything special.