Zero had never been able to find the secret road into Easter Valley, and so it stayed green all the year long.
9 seconds sound clip from the The First Easter Rabbit (1976) movie soundboard.
You can hear this line at 00:11:10.047 in the Blu-ray version of the movie.
Quote context
[...]
- Bruce? What have you found out about the road into Easter Valley?
- Did the elves know anything?
- Not a thing. Not a thing. I'd give up.
- You see, zero and Bruce were in charge of keeping the north pole nice and white.
- Everything was all lovely, and covered with snow except Easter Valley.
- We can't give up, Bruce. We just can't. There has to be a way.
- Say, it seems that bird is indicating a direction to follow.
[...]