The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Forsyth–Edwards Notation 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 241st snoozingnewt 🇨🇦 829 138 96ms 13 days ago 242nd edsrzf 🇳🇿 829 147 3ms 25 days ago 243rd Shanethegamer 🇺🇸 828 159 515ms 14 Jul 2023 244th m-tkach 🇺🇦 827 117 675ms 21 Jan 2024 244th b-illy 🇬🇧 827 117 530ms 14 Jun 2025 246th tayloia 🇬🇧 827 135 9ms 2 May 2023 246th thisishowmymindworks 🇳🇴 827 135 9ms 6 Jun 2023 246th jared-hughes 827 135 9ms 28 Jul 2023 246th Argeento 🇵🇱 827 135 9ms 8 Sep 2023 246th Andrey-Plotnikov 827 135 9ms 26 Sep 2025 246th Lv0Sys 🇵🇱 827 135 9ms 10 days ago 252nd the-zammers 827 160 122ms 10 Nov 2023 252nd tobeannouncd 827 160 148ms 12 Jan 2024 254th Steffan153 🇫🇮 826 128 398ms 9 Aug 2024 255th Waffle3z 826 155 1ms 14 Sep 2023 255th edsrzf 🇳🇿 826 155 1ms 22 Aug 2025 257th lynn 826 210 339ms 10 Nov 2025 258th albanian-laundromat 824 83 44ms 31 Oct 2025 259th primo-ppcg 🇹🇭 824 331 11ms 3 Aug 2023 260th emgordon154 822 139 10ms 19 May 2025 260th blaztoma 🇱🇹 822 139 10ms 17 days ago 262nd edsrzf 🇳🇿 822 167 1ms 19 Nov 2025 263rd sisyphus-ppcg 🇦🇺 821 131 7ms 23 Nov 2023 264th DialFrost 🇸🇬 821 136 9ms 14 Jan 2024 265th Shanethegamer 🇺🇸 821 156 1ms 5 May 2023 266th alemelis 817 106 1,096ms 5 Oct 2024 267th DialFrost 🇸🇬 817 128 27ms 1 Mar 2025 268th ahmetdemirag 🇨🇾 816 140 10ms 30 Oct 2024 268th InigoK 🇺🇸 816 140 9ms 10 Sep 2025 270th duckyluuk 🇳🇱 816 151 9ms 14 Jan 2025 271st edsrzf 🇳🇿 816 201 30ms 29 Apr 2025 272nd CaedenHarper 🇨🇦 815 137 8ms 23 Aug 2025 273rd sean-niemann 🇺🇸 815 196 262ms 28 Aug 2023 274th olleicua 🇺🇸 814 84 53ms 13 May 2025 275th Steffan153 🇫🇮 813 119 576ms 17 Jan 2024 276th DialFrost 🇸🇬 813 162 452ms 5 Jun 2024 277th rschwa6308 🇺🇸 810 141 16ms 5 May 2023 277th zbreit 🇺🇸 810 141 16ms 5 May 2023 277th neel11235813 810 141 10ms 25 Oct 2023 277th MeWhenI 🇻🇦 810 141 9ms 26 Feb 2025 281st typeswitch-dev 🇵🇹 810 161 3ms 1 Sep 2023 282nd JDiLenarda 🇫🇷 810 181 1,376ms 26 Jun 2025 283rd Shanethegamer 🇺🇸 810 205 30ms 9 May 2023 284th Steffan153 🇫🇮 809 103 4ms 17 Aug 2024 285th Irratix 🇳🇱 809 138 9ms 27 May 2023 286th emgordon154 809 346 408ms 9 Mar 2025 286th Shanethegamer 🇺🇸 809 346 1,447ms 14 Apr 2025 288th ericlangedijk 🇸🇮 808 131 400ms 22 May 2023 289th edsrzf 🇳🇿 806 182 1,340ms 18 Jun 2025 290th GolfingSuccess 🇬🇷 805 142 9ms 1 May 2023 290th janbehrens 🇩🇪 805 142 10ms 1 May 2023 290th MichalMarsalek 🇨🇿 805 142 9ms 1 May 2023 290th inventshah 805 142 9ms 3 May 2023 290th doktoren 805 142 9ms 7 Dec 2023 290th anter69 🇭🇺 805 142 9ms 7 Oct 2024 290th roguh 🇬🇹 805 142 12ms 15 Oct 2024 290th KasperKivimaeki 🇫🇮 805 142 9ms 2 Nov 2025 298th SirBogman 🇺🇸 804 87 32ms 4 Dec 2023 299th Shanethegamer 🇺🇸 804 161 385ms 3 May 2023 300th edsrzf 🇳🇿 804 200 50ms 7 Apr 2025 301st rucin93 🇵🇱 803 133 135ms 21 Feb 2025 302nd DialFrost 🇸🇬 802 108 742ms 31 Aug 2025 302nd CaedenHarper 🇨🇦 802 108 721ms 16 Sep 2025 304th SirBogman 🇺🇸 801 73 2ms 4 Dec 2023 305th revlayle 🇺🇸 801 132 394ms 7 Jun 2023 305th AdrienHache 🇫🇷 801 132 425ms 28 Dec 2024 307th mtirado1 800 160 1ms 1 May 2023 308th edsrzf 🇳🇿 800 167 7ms 17 Jun 2025 309th pardouin 🇫🇷 799 106 1,085ms 23 Jul 2025 310th davecame 799 143 15ms 30 Nov 2023 310th stefangimmillaro 799 143 11ms 23 May 2025 312th emgordon154 798 166 8ms 7 Jan 2025 313th emgordon154 796 129 4,538ms 28 Feb 2025 314th SirBogman 🇺🇸 794 144 9ms 1 May 2023 314th cros107 🇦🇺 794 144 9ms 26 Oct 2023 316th GrayJoKing 🇦🇺 794 209 26ms 24 May 2023 317th kg583 🇺🇸 793 122 394ms 12 Mar 2024 318th Yewzir 🇧🇪 793 244 1,766ms 17 May 2024 319th Shanethegamer 🇺🇸 792 107 981ms 1 May 2023 320th Steffan153 🇫🇮 792 127 1ms 17 Aug 2024 First Prev 241–320 of 832 Next Last