For those who haven’t participated in the Advent of Code, or who didn’t read carefully enough at the end of previous years’ tournaments 
, each puzzle contains at least one Easter Egg in the form of a tooltip. In my experience ,the Easter Egg is never helpful for solving the puzzle, but sometimes amusing, if only wryly.
For example, Day 2’s Easter Egg is rather wry, while Day 1’s is “merely” cute.