The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Foo Fizz Buzz Bar in all languages in chars. 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 Chars Time Submitted 400th itsh01 905 85 10ms 25 Nov 2021 400th nathanadams 🇳🇿 905 85 10ms 16 Apr 2023 400th dmrichwa 🇺🇸 905 85 10ms 6 Aug 2024 400th ovs-code 🇩🇪 905 85 10ms 17 Nov 2024 400th Salutations45 905 85 9ms 27 Nov 2024 400th attila8192 905 85 9ms 20 Jul 2025 407th kops-cg 905 94 15ms 3 Mar 2025 408th tuffnatty 🇩🇪 905 126 4ms 17 Jul 2023 409th Shanethegamer 🇺🇸 904 105 125ms 22 Nov 2021 410th m-tkach 🇺🇦 904 123 26ms 21 Aug 2023 411th P-Quentin 🇫🇷 903 72 43ms 3 Aug 2022 412th primo-ppcg 🇹🇭 903 120 22ms 23 Nov 2021 412th AlephSquirrel 903 120 23ms 5 Feb 2024 412th CLOStrophobic 🇮🇹 903 120 22ms 18 Jan 2025 415th squid233 903 137 423ms 7 Nov 2025 416th Lydxn 🇨🇦 902 83 5ms 11 May 2023 416th btnlq 902 83 5ms 21 Oct 2023 418th CLOStrophobic 🇮🇹 902 111 42ms 13 Feb 2025 418th kg583 🇺🇸 902 111 42ms 15 Feb 2025 420th byronknoll 🇺🇸 902 132 60ms 25 Jan 2024 421st Sp3000 🇦🇺 901 85 13ms 23 Nov 2021 421st sean-niemann 🇺🇸 901 85 3ms 27 Dec 2024 423rd Steffan153 🇫🇮 901 104 97ms 16 Oct 2022 424th janbehrens 🇩🇪 901 105 130ms 5 Mar 2022 424th alomiF 901 105 132ms 30 Aug 2023 424th Steffan153 🇫🇮 901 105 4ms 19 Aug 2024 427th albanian-laundromat 900 69 417ms 7 Oct 2025 428th Lydxn 🇨🇦 900 103 1,266ms 3 Apr 2022 429th pardouin 🇫🇷 900 109 3,906ms 31 Oct 2024 429th emgordon154 900 109 4,358ms 31 Oct 2024 431st GrayJoKing 🇦🇺 900 112 2ms 16 Jul 2024 432nd dokutan 899 92 14ms 1 Jul 2024 433rd ovs-code 🇩🇪 898 127 3ms 14 Jul 2023 433rd typeswitch-dev 🇵🇹 898 127 3ms 24 Jul 2023 435th MeWhenI 🇻🇦 897 89 11ms 3 Jul 2023 436th lynn 897 124 24ms 11 Jul 2023 436th Steffan153 🇫🇮 897 124 24ms 16 Jun 2024 438th CaedenHarper 🇨🇦 897 138 456ms 3 Oct 2025 439th albanian-laundromat 896 82 766ms 24 Sep 2025 440th GrayJoKing 🇦🇺 896 120 39ms 20 Jun 2022 440th 386asm 🇺🇸 896 120 40ms 27 Apr 2023 442nd Steffan153 🇫🇮 895 69 120ms 6 Aug 2024 442nd emgordon154 895 69 129ms 18 Oct 2024 442nd sean-niemann 🇺🇸 895 69 134ms 5 Jul 2025 445th Lydxn 🇨🇦 895 71 280ms 19 Jul 2022 446th NicolasBn 🇫🇷 895 73 253ms 7 Jan 2022 446th sultan 895 73 269ms 14 Apr 2022 446th okhoel 🇳🇴 895 73 250ms 19 Sep 2022 446th KevinMarquette 🇺🇸 895 73 253ms 17 Apr 2023 446th gubadam 895 73 269ms 7 Nov 2023 451st btnlq 895 95 14ms 9 Dec 2021 452nd pardouin 🇫🇷 895 116 466ms 17 Aug 2024 453rd ovs-code 🇩🇪 895 133 449ms 28 Feb 2023 454th didion0 🇺🇸 894 86 10ms 23 Nov 2021 454th MattShaile 894 86 10ms 20 Mar 2022 454th samthidny 894 86 10ms 20 Mar 2022 454th Irratix 🇳🇱 894 86 9ms 1 Apr 2022 454th Shanethegamer 🇺🇸 894 86 10ms 1 Apr 2022 454th 0x24a537r9 894 86 10ms 20 Aug 2022 454th DayDun 🇸🇪 894 86 9ms 17 Jan 2023 454th thisishowmymindworks 🇳🇴 894 86 10ms 8 Jun 2023 454th Maznek 894 86 13ms 1 Jul 2023 454th coreynash 894 86 10ms 15 Sep 2023 454th Davr1 🇨🇿 894 86 10ms 14 Oct 2023 454th byronknoll 🇺🇸 894 86 9ms 14 May 2024 454th 0scarB 894 86 12ms 14 Jun 2024 454th thadeucity 894 86 10ms 23 May 2025 468th Shanethegamer 🇺🇸 893 105 100ms 15 Oct 2022 468th sisyphus-ppcg 🇦🇺 893 105 100ms 19 Oct 2022 468th stefangimmillaro 893 105 100ms 19 Oct 2022 468th sean-niemann 🇺🇸 893 105 104ms 19 Mar 2025 472nd MeWhenI 🇻🇦 893 113 12ms 29 Mar 2024 473rd canissimia 🇦🇶 893 138 186ms 20 May 2023 474th GrayJoKing 🇦🇺 892 106 3ms 12 Sep 2022 474th Shanethegamer 🇺🇸 892 106 140ms 23 May 2023 474th btnlq 892 106 131ms 15 Oct 2023 477th ovs-code 🇩🇪 892 108 2ms 16 Feb 2023 478th emgordon154 892 145 3ms 15 Jan 2025 479th yzhs 🇩🇪 891 73 12ms 16 Jun 2022 479th PrathamMehta08 891 73 45ms 6 Dec 2023 First Prev 401–480 of 3,377 Next Last