[Advent of Code](https://adventofcode.com/)!↵
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Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as interview prep, company training, university coursework, practice problems, a speed contest, or to challenge each other.↵
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The first puzzles will unlock on December 1st at midnight EST (UTC-5).↵
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Some changes starting this year from the previous year(s):↵
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- There will be 12 puzzles instead of 25. ([Why did the number of days per event change?](https://adventofcode.com/2025/about#faq_num_days))↵
↵
- There is no global leaderboard. ([What happened to the global leaderboard?](https://adventofcode.com/2025/about#faq_leaderboard))
↵
Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as interview prep, company training, university coursework, practice problems, a speed contest, or to challenge each other.↵
↵
The first puzzles will unlock on December 1st at midnight EST (UTC-5).↵
↵
Some changes starting this year from the previous year(s):↵
↵
- There will be 12 puzzles instead of 25. ([Why did the number of days per event change?](https://adventofcode.com/2025/about#faq_num_days))↵
↵
- There is no global leaderboard. ([What happened to the global leaderboard?](https://adventofcode.com/2025/about#faq_leaderboard))
