The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Farey Sequence 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 801st NanduBC 548 116 11ms 6 Sep 2024 802nd snoozingnewt 🇨🇦 546 156 2ms 15 Oct 2025 803rd MWI-polygolf 545 137 4ms 7 Dec 2023 804th Apataras 545 139 395ms 3 Jul 2025 805th weliveinhell 🇭🇹 545 147 121ms 2 Dec 2023 806th KatieLG 🇬🇧 543 113 617ms 19 Apr 2025 807th HumanoidCPU 542 119 2ms 5 Mar 2024 808th janbehrens 🇩🇪 538 120 2ms 22 Dec 2023 809th msbranicky 538 149 122ms 1 Jan 2024 810th msbranicky 536 151 166ms 2 Jan 2024 811th CatsAreFluffy 536 159 65ms 31 Jan 2024 812th msbranicky 535 117 139ms 2 Jan 2024 813th blaztoma 🇱🇹 534 78 49ms 4 Nov 2025 814th dokutan 534 104 847ms 29 Oct 2024 815th jeff-at-tamer-dot-codes 🇺🇸 534 119 20ms 19 Dec 2023 816th MeWhenI 🇻🇦 532 84 2ms 1 Dec 2023 817th janbehrens 🇩🇪 530 138 400ms 17 Apr 2025 818th Yewzir 🇧🇪 529 150 3ms 29 Mar 2024 819th HumanoidCPU 529 153 92ms 16 Nov 2025 820th dcgjb 527 80 975ms 25 Mar 2024 821st YAJUE114514 527 138 146ms 23 Jul 2025 822nd anarconic 526 125 2ms 11 Dec 2023 823rd Yewzir 🇧🇪 525 117 88ms 5 Feb 2024 824th TinyTheBrontosaurus 525 121 19ms 3 Dec 2023 824th RobertHoeh 525 121 11ms 9 Dec 2023 824th klixel 🇨🇦 525 121 10ms 21 Jun 2025 827th MeWhenI 🇻🇦 525 132 12ms 12 Dec 2023 828th msbranicky 522 152 3ms 2 Jan 2024 829th HumanoidCPU 521 80 35ms 5 Jun 2024 830th snoozingnewt 🇨🇦 521 121 1,676ms 15 Oct 2025 831st Just4FunCoder 521 122 20ms 26 Feb 2024 831st SB-945 521 122 24ms 7 Apr 2024 833rd steffan-polygolf 521 133 11ms 29 Feb 2024 834th dokutan 517 121 119ms 29 Oct 2024 835th JDiLenarda 🇫🇷 517 122 1,326ms 13 Sep 2024 836th Stockoh 🇫🇷 517 123 11ms 23 Apr 2024 836th jatloe 517 123 24ms 24 Aug 2024 838th snoozingnewt 🇨🇦 516 125 2ms 15 Oct 2025 839th aksyristos 515 81 34ms 30 Nov 2024 840th janbehrens 🇩🇪 514 97 602ms 9 Jan 2024 841st Kokusui 🇯🇵 513 108 5ms 26 Jul 2024 842nd yuchuehw 513 124 20ms 15 May 2024 842nd Flekay 🇩🇪 513 124 19ms 11 Jul 2025 844th KatieLG 🇬🇧 510 109 1,050ms 2 Jan 2024 845th snoozingnewt 🇨🇦 509 136 9ms 15 Oct 2025 846th dokutan 509 156 3ms 26 Oct 2024 847th estomagordo 🇳🇱 508 125 10ms 25 Mar 2025 848th snoozingnewt 🇨🇦 508 143 3,668ms 15 Oct 2025 849th msbranicky 507 116 112ms 1 Jan 2024 850th typeswitch-dev 🇵🇹 507 151 5ms 25 Jun 2024 851st alphafalfa 506 107 2ms 26 Aug 2024 852nd dokutan 505 100 7ms 28 Oct 2024 853rd Vaekor 504 126 12ms 28 Feb 2024 854th msbranicky 501 111 976ms 2 Jan 2024 855th KatieLG 🇬🇧 501 170 5ms 3 Dec 2023 856th scpchicken 🇵🇼 497 90 3ms 13 Dec 2023 857th 4ndyJ 🇬🇧 497 128 10ms 29 Feb 2024 858th evnu 497 160 100ms 13 Oct 2025 859th msbranicky 496 142 17ms 6 Jan 2024 860th Yewzir 🇧🇪 494 101 238ms 26 Feb 2024 861st Yewzir 🇧🇪 494 112 7ms 5 Feb 2024 862nd HumanoidCPU 493 129 21ms 5 Jun 2024 862nd CutSandstone 493 129 11ms 19 Jul 2024 862nd wh3n3v3r 🇨🇿 493 129 21ms 18 Nov 2024 865th dokutan 492 163 117ms 6 Nov 2024 866th snoozingnewt 🇨🇦 491 116 694ms 15 Oct 2025 867th MeWhenI 🇻🇦 490 89 117ms 1 Dec 2023 868th addmai 489 130 19ms 30 Jul 2025 869th dokutan 488 111 2ms 28 Apr 2025 870th HumanoidCPU 487 126 591ms 5 Jun 2024 871st HumanEquivalentUnit 487 133 14ms 5 Dec 2023 872nd Protothor 485 119 10ms 20 Jul 2025 873rd bjornmartensson 485 131 77ms 11 Dec 2023 873rd Mabeloid 🇳🇴 485 131 19ms 11 Sep 2024 875th snoozingnewt 🇨🇦 484 112 2ms 15 Oct 2025 876th msbranicky 483 130 2ms 2 Jan 2024 877th michelebastione 🇮🇹 482 132 23ms 23 Dec 2023 877th CatsAreFluffy 482 132 25ms 31 Jan 2024 877th FranklinJiaChen 482 132 27ms 4 Aug 2024 880th msbranicky 482 134 2ms 2 Jan 2024 First Prev 801–880 of 1,483 Next Last