https://adventofcode.com/2022/about
I have done everything of 2022 in december 2022 using Python 3. AoC 2023 was done mainly in december 2023 (except day 17, 24, 25) using Python 3. I will do 2024 at the time of release.
I'm going through 2015 at the same time when bored, I might try some other language at some point.