The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
brainfuck in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 799th LostSyntax21 🇬🇧 563 287 23ms 19 Jan 2025 802nd aditsu 563 325 4,299ms 11 Aug 2025 803rd hellopatrick 563 438 37ms 29 Dec 2022 804th bbakersmith 561 288 138ms 28 Jun 2022 804th jakobkordez 🇸🇮 561 288 12ms 7 Feb 2024 806th Mandrzejy 🇵🇱 560 108 55ms 9 Apr 2024 807th Natanaelel 🇸🇪 560 132 6ms 25 Oct 2023 808th neihousaigaai 559 232 11ms 6 Mar 2022 809th Irratix 🇳🇱 559 238 396ms 3 Aug 2023 810th andrewgopher 559 289 23ms 25 Jun 2022 810th galloj 🇨🇿 559 289 34ms 10 Jan 2023 810th logvp 559 289 28ms 14 Mar 2025 813th Andrey135296 559 293 445ms 6 Oct 2023 814th typeswitch-dev 🇵🇹 557 233 12ms 28 Jul 2023 815th NerdyMcNerd42 557 290 286ms 10 Sep 2022 815th PyryL 🇫🇮 557 290 21ms 20 Aug 2024 817th achimkrause 557 355 207ms 20 Dec 2019 818th cmdrsabre 557 431 111ms 31 Jan 2020 819th codingisgreatbutiamnot 556 291 297ms 12 Aug 2024 819th AstroOrbis 556 291 270ms 23 days ago 821st sean-niemann 🇺🇸 555 188 5ms 3 Jun 2022 822nd arcpolaris 555 295 482ms 11 Nov 2025 823rd martin-viggiano 555 355 272ms 1 Jul 2022 824th drabart 🇵🇱 554 240 96ms 8 Dec 2023 825th snoozingnewt 🇨🇦 554 433 110ms 20 Oct 2025 826th inventshah 552 189 5ms 2 Apr 2025 827th MateuszPietrzak 🇵🇱 552 241 544ms 8 Dec 2023 828th shelerr 550 294 13ms 15 Sep 2022 828th liamLatour 550 294 17ms 21 Jul 2024 830th malworthy 550 298 413ms 12 Oct 2023 831st Bonjour27891 🇻🇳 548 295 328ms 15 Jul 2022 831st idoweinstein 548 295 43ms 30 Jul 2022 831st HumanoidCPU 548 295 17ms 31 Mar 2025 834th Kacarott 🇦🇺 548 398 10ms 23 Jul 2024 835th dbut2 🇦🇺 547 360 290ms 15 Jul 2025 836th arjanadriaanse 🇳🇱 547 362 187ms 24 Nov 2021 837th Alex-x90 🇺🇸 546 191 2ms 11 Jul 2023 838th msbranicky 546 269 715ms 17 Jan 2024 839th adlerzei 546 300 435ms 3 May 2022 840th DialFrost 🇸🇬 545 202 40ms 28 Feb 2025 841st janbehrens 🇩🇪 545 232 340ms 24 Nov 2024 842nd ovs-code 🇩🇪 545 235 93ms 12 Sep 2024 843rd Kauhentus 545 238 12ms 7 Dec 2019 844th MeWhenI 🇻🇦 544 143 5ms 16 Apr 2023 845th CatsAreFluffy 544 270 656ms 15 Jan 2024 846th madex 🇩🇪 544 297 17ms 9 Jul 2024 847th ericlangedijk 🇸🇮 544 301 402ms 21 Mar 2022 848th jerrandolph 544 362 312ms 22 Dec 2023 849th m4c0 543 245 87ms 26 Jan 2022 849th Herbert00709 🇵🇱 543 245 480ms 12 Apr 2024 851st JRaspass 🇬🇧 543 363 280ms 23 Sep 2022 852nd MeWhenI 🇻🇦 543 454 38ms 14 Jun 2023 853rd blaztoma 🇱🇹 542 455 137ms 19 days ago 854th Johannesd3 541 193 2ms 9 Apr 2021 855th arvidjonasson 541 246 410ms 8 Jun 2025 856th Andre3582 541 299 29ms 3 Nov 2020 856th pengu1n-master 541 299 21ms 11 Dec 2021 856th brimstonetrader 541 299 23ms 11 Jan 2024 859th Yewzir 🇧🇪 541 364 277ms 3 Jan 2024 860th DialFrost 🇸🇬 540 144 5ms 14 May 2024 861st shraiwi 539 161 48ms 5 Dec 2019 862nd Upload-and-View 🇺🇦 539 300 21ms 21 Aug 2025 862nd M4rc0g1 539 300 23ms 16 Nov 2025 864th derp-all-day 538 204 6ms 27 Nov 2019 865th dokutan 537 248 81ms 28 Jun 2025 866th schachmattmatt 537 301 385ms 29 Sep 2021 866th FranklinJiaChen 537 301 31ms 4 Jul 2024 868th marshallward 🇺🇸 537 356 44ms 6 May 2025 869th rak1507 🇬🇧 536 156 36ms 2 Nov 2021 870th Andrey-Plotnikov 534 243 16ms 23 Sep 2025 871st myleopard 534 303 26ms 15 Oct 2021 871st Heathcorp 🇦🇺 534 303 24ms 5 Dec 2022 871st BREMAUCY 🇫🇷 534 303 290ms 21 Jul 2025 871st yoikolover 534 303 17ms 6 days ago 875th mrmena 🇦🇺 534 369 278ms 29 Mar 2024 876th KasperKivimaeki 🇫🇮 533 206 5ms 8 days ago 877th TetraPengwin 532 301 4ms 15 Dec 2021 878th nstearns96 🇬🇧 532 304 334ms 22 Jan 2023 878th osNiko 🇧🇷 532 304 16ms 19 Aug 2025 880th gifti258 531 241 130ms 15 Sep 2023 First Prev 801–880 of 1,408 Next Last