I mean that's a super cool opinion, but unfortunately it's not correct. Please stop reproducing my copyrighted work.

Day 12: Christmas Tree Farm,Done for now
#AdventOfCode

Day 11: Reactor,Blindness
#AdventOfCode

Day 10: Factory,Manual Munchies
#AdventOfCode

Day 8: Playground,Make sure it's grounded.
#AdventOfCode

Unofficial Advent of Code 2025 Survey This is a quick (unofficial) Advent of Code 2025 anonymous (if you don't disclose your identity in "Other..." answers) participant survey. Note that your data will be shared as part of a (possibly san...

Thanks to @was.tl we are enjoying #AdventOfCode again in 2025, and I am also running the unofficial/community survey again in 2025! 😊

💡 Take care that it closes "early", late Dec 12th or thereabouts! Consider filling it out if you haven't already: forms.gle/TAgtXYskwDXD...

Day 5: Cafeteria,Is this fresh?
#AdventOfCode

Unfortunately, due to a possible problem with printing transparent gradients, I stuck to just black for this year. We'll see how they come out.

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

Day 3: Lobby.Not a stairs.
#AdventOfCode

Keynote: Advent of Code, Behind the Scenes - Eric Wastl YouTube video by CppNorth

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: youtu.be/uZ8DcbhojOw

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

regexes!

no

GRADY

Day 1: Secret Entrance.What's the combination?
#AdventOfCode

Advent of Code isn't open source, and all inputs have been solved very many times by now. Please ask for help on the subreddit: www.reddit.com/r/adventofco...

Yep! I'm pretty sure you can make a throwaway Reddit account with no personal info if your friend wants to try that.

You should be able to curl using just your session cookie.

🚨 Any #AdventOfCode friends at GitHub? AoC users are getting '429 Too Many Requests' in response to the github.com/login/oauth/... request step of the OAuth flow. Last time this happened, I think someone at GitHub tweaked a rate limit in my OAuth app.

What? I would never use absurdly high numError: Integer Overflow

Veloxxmusic - Twitch Weekly live sets of the best in Techno, Progressive House, Melodic House. All recorded sets available on mixcloud! http://veloxx.dj

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

TODD NO

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? 🌟 ❤️ 🎄

an illustration of a penguin laying in a hammock with the words chill written above it ALT: an illustration of a penguin laying in a hammock with the words chill written above it

Anybody else want to join me in taking the #chill, casual fun approach to #AdventOfCode? We'll help each other out when we get stuck, celebrate each other's wins (no matter how small), and generally pursue AoC as a collaborative game (not a competitive one)

Let's have some chill holiday fun, y'all!

The Advent of Code Day 1 countdown showing 23:46:29 remaining until the first puzzle unlocks.

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

From the adventofcode community on Reddit Explore this post and more from the adventofcode community

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).

www.reddit.com/r/adventofco...

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: adventofcode.com/2025/sponsors

(when the first puzzle unlocks)

the Advent of Code hat on the Veloxx logo.

I'm 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!