Proleptic adj. Anticipatory.
Also 'Proleptical'. More Detail
"Well," said Pooh, "what I like best...," and then he had to stop and think. Because, although eating honey was a very good thing to do, there was a moment, just before you began to eat it, which was better than when you were, but he didn't know what it was called.
- A. A. Milne
How many sleeps before Christmas?
"There is no way to be pointed out save [except] the 'I AM'
It is the birth of the spirit." - Edgar Cayce Reading 262-10