Hello Wordsmithers, I'm an artist currently working on a project that would benefit from a kind of antonym for the word "anniversary" the idea being that this word would mean something like "a date that commemorates an event that will happen in the future". I suppose it's a little like a countdown, but the idea would be that this word could refer to (for example) a day exactly 10 years before something happens.

I think it would work best if the word was constructed with plausible etymology, and should at least sound like it's a real word. Then again, I'm open to all ideas perhaps the rule is simply that if it sounds right, it is right.

The project launches in a couple of months and I'd love to hear from anyone who fancies having a crack at this before then!