No doubt that the bunny and his friends have often traveled through time in the pages of four colors with many titles published by Dell/Gold Key/Whitman. The first such possible escapade that I’ve seen was a story called “Fiddling with the Future” in Bugs Bunny 50 in which some gypsy friends of Bugs can read the future.
We saw you reading the future with it over at the carnival!

Variants

(1)
  1. Looney Tunes/Merrie Melodies Comics, |pending byline|, in Bugs Bunny 50, August 1952.