#advent-of-code-2020
What is Advent of Code? https://adventofcode.com/2020/about
From here, you can access all of the events (and the corresponding puzzles, leaderboards, stats, etc) ever run on Advent of Code since 2015:
https://adventofcode.com/2020
https://adventofcode.com/2019
https://adventofcode.com/2018
https://adventofcode.com/2017
https://adventofcode.com/2016
https://adventofcode.com/2015