The Calendar hole will go live in approximately 6 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 800th nullie 563 287 12ms 7 Jun 2022 800th LostSyntax21 🇬🇧 563 287 23ms 19 Jan 2025 803rd aditsu 563 325 3,007ms 11 Aug 2025 804th hellopatrick 563 438 37ms 29 Dec 2022 805th bbakersmith 561 288 138ms 28 Jun 2022 805th jakobkordez 🇸🇮 561 288 12ms 7 Feb 2024 807th Mandrzejy 🇵🇱 560 108 55ms 9 Apr 2024 808th Natanaelel 🇸🇪 560 132 6ms 25 Oct 2023 809th neihousaigaai 559 232 11ms 6 Mar 2022 810th Irratix 🇳🇱 559 238 396ms 3 Aug 2023 811th andrewgopher 559 289 23ms 25 Jun 2022 811th galloj 🇨🇿 559 289 34ms 10 Jan 2023 811th logvp 559 289 28ms 14 Mar 2025 814th Andrey135296 559 293 445ms 6 Oct 2023 815th typeswitch-dev 🇵🇹 557 233 12ms 28 Jul 2023 816th NerdyMcNerd42 557 290 286ms 10 Sep 2022 816th PyryL 🇫🇮 557 290 21ms 20 Aug 2024 818th achimkrause 557 355 207ms 20 Dec 2019 819th cmdrsabre 557 431 111ms 31 Jan 2020 820th codingisgreatbutiamnot 556 291 297ms 12 Aug 2024 820th AstroOrbis 556 291 270ms 25 Nov 2025 822nd sean-niemann 🇺🇸 555 188 5ms 3 Jun 2022 823rd arcpolaris 555 295 475ms 11 Nov 2025 824th martin-viggiano 555 355 272ms 1 Jul 2022 825th drabart 🇵🇱 554 240 65ms 8 Dec 2023 826th snoozingnewt 🇨🇦 554 433 110ms 20 Oct 2025 827th inventshah 552 189 5ms 2 Apr 2025 828th MateuszPietrzak 🇵🇱 552 241 427ms 8 Dec 2023 829th shelerr 550 294 13ms 15 Sep 2022 829th liamLatour 550 294 17ms 21 Jul 2024 831st malworthy 550 298 413ms 12 Oct 2023 832nd Bonjour27891 🇻🇳 548 295 328ms 15 Jul 2022 832nd idoweinstein 548 295 43ms 30 Jul 2022 832nd HumanoidCPU 548 295 17ms 31 Mar 2025 835th Kacarott 🇦🇺 548 398 10ms 23 Jul 2024 836th dbut2 🇦🇺 547 360 290ms 15 Jul 2025 837th arjanadriaanse 🇳🇱 547 362 187ms 24 Nov 2021 838th Alex-x90 🇺🇸 546 191 2ms 11 Jul 2023 839th msbranicky 546 269 715ms 17 Jan 2024 840th adlerzei 546 300 435ms 3 May 2022 841st DialFrost 🇸🇬 545 202 40ms 28 Feb 2025 842nd janbehrens 🇩🇪 545 232 322ms 24 Nov 2024 843rd ovs-code 🇩🇪 545 235 93ms 12 Sep 2024 844th Kauhentus 545 238 12ms 7 Dec 2019 845th MeWhenI 🇻🇦 544 143 5ms 16 Apr 2023 846th CatsAreFluffy 544 270 656ms 15 Jan 2024 847th madex 🇩🇪 544 297 17ms 9 Jul 2024 848th ericlangedijk 🇸🇮 544 301 402ms 21 Mar 2022 849th jerrandolph 544 362 312ms 22 Dec 2023 850th m4c0 543 245 77ms 26 Jan 2022 850th Herbert00709 🇵🇱 543 245 427ms 12 Apr 2024 852nd JRaspass 🇬🇧 543 363 280ms 23 Sep 2022 853rd MeWhenI 🇻🇦 543 454 38ms 14 Jun 2023 854th blaztoma 🇱🇹 542 455 137ms 27 days ago 855th Johannesd3 541 193 2ms 9 Apr 2021 856th arvidjonasson 541 246 410ms 8 Jun 2025 857th Andre3582 541 299 29ms 3 Nov 2020 857th pengu1n-master 541 299 21ms 11 Dec 2021 857th brimstonetrader 541 299 23ms 11 Jan 2024 860th Yewzir 🇧🇪 541 364 277ms 3 Jan 2024 861st DialFrost 🇸🇬 540 144 5ms 14 May 2024 862nd shraiwi 539 161 38ms 5 Dec 2019 863rd Upload-and-View 🇺🇦 539 300 21ms 21 Aug 2025 863rd M4rc0g1 539 300 23ms 16 Nov 2025 865th derp-all-day 538 204 6ms 27 Nov 2019 866th dokutan 537 248 64ms 28 Jun 2025 867th schachmattmatt 537 301 385ms 29 Sep 2021 867th FranklinJiaChen 537 301 31ms 4 Jul 2024 869th marshallward 🇺🇸 537 356 44ms 6 May 2025 870th rak1507 🇬🇧 536 156 36ms 2 Nov 2021 871st Andrey-Plotnikov 534 243 16ms 23 Sep 2025 872nd myleopard 534 303 26ms 15 Oct 2021 872nd Heathcorp 🇦🇺 534 303 24ms 5 Dec 2022 872nd BREMAUCY 🇫🇷 534 303 290ms 21 Jul 2025 872nd yoikolover 534 303 17ms 14 days ago 876th mrmena 🇦🇺 534 369 278ms 29 Mar 2024 877th KasperKivimaeki 🇫🇮 533 206 5ms 16 days ago 878th TetraPengwin 532 301 4ms 15 Dec 2021 879th nstearns96 🇬🇧 532 304 334ms 22 Jan 2023 879th osNiko 🇧🇷 532 304 16ms 19 Aug 2025 First Prev 801–880 of 1,410 Next Last