Eric Wastl

Hello, friends! After 10(!) years of #AdventOfCode, I've made some changes to preserve my sanity: there will be 12 days of puzzles each December (still starting Dec 1) and there is no longer a global leaderboard. Read more:
https://adventofcode.com/2025/about#faq_num_days
https://adventofcode.com/2025/about#faq_leaderboard

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If you'd like any programming practice, I have ten years (soon: 11) of programming puzzles on adventofcode.com!

All of the puzzles are completely free! This is possible in part due to some lovely sponsors who you should definitely check out: https://adventofcode.com/2025/sponsors

The first #AdventOfCode 2025 puzzle comes out in about five hours! What's your plan? What language(s?!) are you using? What's your IDE of choice and why is it Vim? Do you have a comfy chair? Did you check out the beta release of Lua 5.5? How much sleep have you gotten? Drinking enough water? 🌟 ❤️ 🎄

If you're curious what it takes to run #AdventOfCode every year, I have a talk called Advent of Code: Behind the Scenes that you might enjoy: https://youtu.be/uZ8DcbhojOw

Hello, US timezone friends! A very merry Confuse Everyone Who Prints Datetimes To Their Logs Without Timezones night to all who celebrate!

We're 25% of the way through #AdventOfCode 2025! How is everyone feeling? Learn anything cool? Make any neat visualizations?? Ready for more???

Reminder: Please throttle your #AdventOfCode traffic

Please don't make frequent automated requests - avoid sending requests more often than once every 15 minutes (900 seconds).

https://www.reddit.com/r/adventofcode/comments/1pa472d/reminder_please_throttle_your_aoc_traffic/

Incredible #AdventOfCode music video: https://www.youtube.com/watch?v=zF_4miExauw

New #AdventOfCode objects! (and new shipping options!) https://adventofcode.com/2025/shop

#AdventOfCode 2025 launch party is live! https://www.twitch.tv/veloxxmusic

Veloxx is DJing the #adventofcode 2025 unlock party again!

Tune in on twitch.tv/veloxxmusic from 10:30p Eastern until 1:30a for a countdown and great beats for the first unlock!

#AdventOfCode 2025 sponsorship is now open! If your organization might be interested in sponsoring, please have them email sponsorship at [the Advent of Code domain name]. https://adventofcode.com/2025/sponsors