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Logic Puzzle Advent Calendar 2026

The countdown starts December 1: one new door every day at midnight UTC until Christmas Eve.

01 Dec 1
02 Dec 2
03 Dec 3
04 Dec 4
05 Dec 5
06 Dec 6
07 Dec 7
08 Dec 8
09 Dec 9
10 Dec 10
11 Dec 11
12 Dec 12
13 Dec 13
14 Dec 14
15 Dec 15
16 Dec 16
17 Dec 17
18 Dec 18
19 Dec 19
20 Dec 20
21 Dec 21
22 Dec 22
23 Dec 23
24 Dec 24

Next door: December 1 (Nonogram). Every door stays open forever after its day.

A free online advent calendar where the chocolate is a logic puzzle: 24 doors, 24 Christmas brain teasers, one new logic puzzle behind every door from December 1st to Christmas Eve. This advent calendar is entirely free, needs no sign-up, and every door opens in your browser or on paper.

Instead of chocolate or tiny GIFs, every door of this online advent calendar opens a complete, machine-verified Christmas logic puzzle from our six game families: paint hidden pictures in nonograms, line up the neighbors in zebra puzzles, match suspects on logic grids, place bulbs in light up, draw the loop in slitherlink and seat the court in queens. The games rotate day by day, and because weekend dailies are the biggest grids of the week, the calendar grows harder toward Christmas Eve exactly like an advent calendar should.

Every puzzle is the real daily puzzle of its date, which means three things: it is the same fair, no-guessing puzzle every visitor gets, it comes with a full print sheet (puzzle on the front, solution on the back) for classrooms, puzzle clubs and screen-free December evenings, and it stays available forever after its door opens. Christmas brain teasers have a habit of turning into family traditions, and this logic puzzle advent calendar is built so the tradition can survive being discovered on December 17th: no door ever closes, and next December brings a fresh calendar automatically.

How the Calendar Works

Door number N of the advent calendar opens on December N at midnight UTC, one door per day, for 24 days, so the countdown paces itself exactly like a traditional advent calendar. Behind each door you find that day’s featured puzzle together with its rules, its archive entry and its print sheet. Missed days are never lost: doors stay open, so a late start just means a longer first sitting. If you are reading this before the season starts, the countdown above shows which game hides behind each upcoming door.

Printable Christmas Logic Puzzles for Classrooms

December is the busiest month for printable Christmas logic puzzles, and every door of this advent calendar doubles as a clean worksheet: the grid or clue sheet on the front, the worked solution on the last page, sized for both A4 and US Letter. Print a door a day for a classroom countdown of Christmas brain teasers, bundle the whole 24 for a puzzle club, or stack a week of them for a holiday trip. Like everything on LogicPuzzle.io, the sheets are free and need no account.

Advent Calendar FAQ

What is an online advent calendar?

An online advent calendar is a digital countdown to Christmas with 24 doors, one for each day of December. Behind every door of this advent calendar sits a complete logic puzzle you can play in the browser or print on paper, so the countdown itself becomes a daily brain workout instead of a chocolate.

How do the doors open?

Door number N opens on December N at midnight UTC, exactly like the daily puzzles: every door is that day’s featured puzzle from one of our six games. Doors never close again, so if you start late you can catch up on every puzzle you missed.

Which puzzles are behind the doors?

All six game families take turns: nonograms, zebra puzzles, logic grid puzzles, light up (Akari), slitherlink and queens (Star Battle). The rotation repeats about four times across the 24 doors, and weekend doors open the biggest grids of the week, so the Christmas logic puzzles grow harder as the advent calendar approaches Christmas Eve.

Is this advent calendar free?

Yes, this online advent calendar is completely free, no sign-up. Play every door online, or use each puzzle’s print sheet for a screen-free countdown. Teachers and puzzle clubs are welcome to print the whole advent calendar for December brain teasers.

Can I print a Christmas logic puzzle every day?

Yes. Every open door of the advent calendar links to a print-ready sheet with the Christmas logic puzzle on the front and the solution on the last page, laid out for A4 and US Letter. A printable logic puzzle advent calendar for classrooms is one of the most popular ways to use the site in December.

Looking for today’s regular puzzles instead? Every game also publishes its own daily at midnight UTC — browse them all on the complete puzzle index.