The Calendar hole will go live in approximately 10 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 561st revlayle 🇺🇸 671 244 411ms 21 Nov 2021 562nd mcreenan 670 116 6ms 6 Feb 2018 562nd iczelia 🇩🇪 670 116 5ms 22 Sep 2025 564th syntax-rules 670 253 64ms 4 May 2023 565th 2bular 669 125 38ms 9 Nov 2025 566th tatzyr 🇯🇵 668 130 41ms 12 Feb 2025 567th MeWhenI 🇻🇦 667 205 10ms 15 Nov 2022 568th Aurel300 🇨🇭 667 354 175ms 6 Jun 2024 569th bluebear94 665 195 12ms 4 Feb 2018 569th wansacis 🇩🇪 665 195 11ms 23 Jul 2021 569th smclaughlin-cf 665 195 11ms 11 Jun 2025 572nd Shanethegamer 🇺🇸 665 217 106ms 24 May 2025 573rd btjones0 665 243 27ms 8 Jan 2021 573rd guilhem-roy 🇫🇷 665 243 331ms 27 Jul 2023 575th MichalMarsalek 🇨🇿 665 244 354ms 28 Nov 2021 576th plcc0 663 131 49ms 10 Oct 2025 576th Lv0Sys 🇵🇱 663 131 55ms 21 days ago 578th fgrosshans 🇫🇷 663 244 24ms 18 Jul 2022 579th nking07049925 662 196 11ms 2 Jun 2024 579th unfinishedprogram 662 196 11ms 20 Sep 2024 579th alexsave 662 196 13ms 5 Nov 2025 582nd JDiLenarda 🇫🇷 662 377 1,348ms 28 Oct 2020 583rd The3gs 661 357 151ms 28 Nov 2024 584th za3k 660 245 23ms 12 Oct 2022 584th willdaspit 660 245 22ms 5 Aug 2023 586th KasperKivimaeki 🇫🇮 660 248 368ms 10 Apr 2025 587th perlebach 🇨🇿 660 277 3,179ms 7 Jun 2025 588th duckyluuk 🇳🇱 659 235 120ms 13 Nov 2025 589th timvermeulen 659 358 173ms 4 Jan 2020 590th Andriamanitra 🇫🇮 658 132 45ms 9 Oct 2023 591st ForkKILLET 🇨🇳 658 197 1,053ms 29 Jul 2021 591st TheRealOhead 🇺🇸 658 197 14ms 4 Apr 2023 593rd MeWhenI 🇻🇦 658 219 26ms 28 Jul 2023 593rd typeswitch-dev 🇵🇹 658 219 5ms 2 Aug 2023 595th voytasify 🇵🇱 658 249 365ms 21 Nov 2021 596th IISResetMe 657 158 578ms 27 days ago 597th MeWhenI 🇻🇦 657 235 40ms 26 Aug 2023 598th CedricGebistorf 657 246 21ms 5 Mar 2022 598th dirckvdende 657 246 22ms 12 Jul 2025 600th rucin93 🇵🇱 657 309 215ms 10 Jul 2025 601st dokutan 656 231 6ms 5 Sep 2024 602nd lowlighter 655 198 12ms 1 Nov 2020 603rd BlankSpruce 655 247 13ms 9 Sep 2022 604th Eolu 655 360 164ms 8 Apr 2021 604th luuumine 🇫🇷 655 360 161ms 12 days ago 606th SirBogman 🇺🇸 653 128 36ms 26 Apr 2022 607th olivermrose 🇺🇸 653 133 52ms 10 Oct 2021 607th olleicua 🇺🇸 653 133 39ms 20 Jan 2024 609th MeWhenI 🇻🇦 653 221 156ms 5 Sep 2023 610th b97tsk 653 302 286ms 23 Apr 2020 611th eranws 652 199 11ms 17 Oct 2022 612th Mandrzejy 🇵🇱 649 205 568ms 17 Mar 2025 613th msrawson 649 249 21ms 4 Sep 2018 614th KatieLG 🇬🇧 648 134 40ms 26 Dec 2023 615th MeWhenI 🇻🇦 648 295 40ms 17 May 2023 616th asheeri 647 250 32ms 15 Aug 2021 616th kmaork 🇮🇱 647 250 233ms 17 Aug 2023 616th alfonsoalves 647 250 28ms 21 Jul 2024 616th fredrik-bakke 🇳🇴 647 250 22ms 17 Mar 2025 620th 386asm 🇺🇸 646 239 48ms 4 May 2023 621st sean-niemann 🇺🇸 645 212 259ms 15 Aug 2023 622nd ovs-code 🇩🇪 644 162 2ms 19 Mar 2024 622nd MostParsingVex 644 162 3ms 2 Jan 2025 624th ZoeyKD 644 251 339ms 14 May 2023 624th janbehrens 🇩🇪 644 251 20ms 24 Nov 2024 626th MeWhenI 🇻🇦 644 256 34ms 13 Dec 2023 627th Xzyaihni 643 367 206ms 15 Jan 2024 628th amishtal 642 252 20ms 1 Dec 2019 628th domingues 🇵🇹 642 252 527ms 9 Aug 2022 630th jared-hughes 640 208 413ms 2 Nov 2022 631st sean-niemann 🇺🇸 640 278 591ms 24 Sep 2025 632nd edsrzf 🇳🇿 640 308 259ms 25 Oct 2024 633rd msbranicky 640 369 171ms 19 Sep 2023 634th KaeruCT 639 203 11ms 2 Sep 2024 635th FortuiteMan 🇫🇷 639 253 16ms 14 days ago 636th Shanethegamer 🇺🇸 639 611 726ms 8 Apr 2025 637th emgordon154 638 136 53ms 14 May 2025 638th KarstenHohmeier 638 172 5ms 7 Mar 2018 639th bendiscz 638 309 325ms 21 Apr 2020 640th MeWhenI 🇻🇦 638 318 180ms 10 Sep 2022 First Prev 561–640 of 1,409 Next Last