The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Forsyth–Edwards Notation 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 160th CaedenHarper 🇨🇦 858 95 10ms 1 Aug 2025 162nd GrayJoKing 🇦🇺 858 149 3ms 30 Jul 2023 163rd Shanethegamer 🇺🇸 858 168 1,343ms 12 May 2023 164th Irratix 🇳🇱 856 112 9ms 27 May 2023 164th coreynash 856 112 9ms 12 Oct 2023 166th kg583 🇺🇸 855 156 48ms 23 Jun 2025 167th sean-niemann 🇺🇸 855 158 2ms 19 Nov 2025 168th edsrzf 🇳🇿 853 95 1,136ms 31 Aug 2025 169th acotis 853 177 190ms 16 Apr 2025 170th nwellnhof 🇩🇪 853 184 274ms 6 May 2023 171st edsrzf 🇳🇿 852 192 27ms 26 Apr 2025 172nd xsot 🇸🇬 851 123 6ms 20 Apr 2025 172nd targrik 851 123 5ms 1 Aug 2025 174th DialFrost 🇸🇬 849 96 9ms 8 Oct 2023 174th neel11235813 849 96 10ms 25 Oct 2023 174th anter69 🇭🇺 849 96 9ms 7 Oct 2024 174th roguh 🇬🇹 849 96 10ms 15 Oct 2024 178th Steffan153 🇫🇮 848 124 100ms 3 May 2023 179th GrayJoKing 🇦🇺 848 129 13ms 13 Jun 2023 179th annaproxy 848 129 13ms 13 Jun 2023 181st primo-ppcg 🇹🇭 847 182 41ms 4 May 2025 182nd emgordon154 845 96 4ms 11 Oct 2024 182nd sean-niemann 🇺🇸 845 96 4ms 11 Jan 2025 184th namelessiw 845 116 411ms 21 Oct 2025 185th ovs-code 🇩🇪 844 73 43ms 1 May 2023 185th prplz 🇦🇺 844 73 49ms 9 May 2023 187th MeWhenI 🇻🇦 844 138 6ms 15 Jun 2023 188th canissimia 🇦🇶 844 197 2ms 28 Aug 2023 189th emgordon154 842 90 345ms 23 Apr 2025 190th Salutations45 842 96 1ms 22 Jan 2025 191st SirBogman 🇺🇸 841 97 9ms 1 May 2023 192nd DialFrost 🇸🇬 841 131 101ms 17 days ago 193rd edsrzf 🇳🇿 841 211 1,618ms 17 Jun 2025 194th DialFrost 🇸🇬 837 159 448ms 24 Sep 2025 194th CaedenHarper 🇨🇦 837 159 474ms 4 Oct 2025 196th antimon2 🇯🇵 836 90 1,607ms 2 May 2023 197th GrayJoKing 🇦🇺 836 150 371ms 24 Jul 2025 198th m-tkach 🇺🇦 836 193 28ms 13 May 2023 199th Shanethegamer 🇺🇸 835 97 1,233ms 2 May 2023 200th MeWhenI 🇻🇦 834 115 9ms 26 Feb 2025 201st primo-ppcg 🇹🇭 834 138 70ms 29 Sep 2023 202nd Shanethegamer 🇺🇸 833 91 425ms 16 Jan 2024 203rd Steffan153 🇫🇮 833 149 4ms 20 Aug 2023 204th NerdyMcNerd42 832 98 10ms 13 May 2023 205th MeWhenI 🇻🇦 832 145 10ms 29 Dec 2024 206th h3ra993huskp 🇯🇵 832 160 470ms 19 days ago 207th AlephSquirrel 830 158 6ms 23 Jan 2025 208th Steffan153 🇫🇮 830 197 31ms 9 May 2023 209th sisyphus-ppcg 🇦🇺 828 65 197ms 1 May 2023 210th stefangimmillaro 828 127 103ms 23 May 2025 211th m-tkach 🇺🇦 828 193 2ms 4 Mar 2025 212th albanian-laundromat 828 312 510ms 24 Oct 2025 213th Steffan153 🇫🇮 826 80 2ms 2 May 2023 214th MichalMarsalek 🇨🇿 825 152 368ms 2 Jun 2023 215th duckyluuk 🇳🇱 824 92 364ms 28 Aug 2024 216th InigoK 🇺🇸 824 99 10ms 29 Aug 2025 216th qpwoeirut 824 99 9ms 1 Oct 2025 216th snoozingnewt 🇨🇦 824 99 9ms 31 Oct 2025 219th btnlq 824 119 402ms 9 May 2023 219th tomtheisen 🇺🇸 824 119 368ms 13 Feb 2025 221st edsrzf 🇳🇿 824 127 5ms 25 Jul 2025 222nd jared-hughes 824 259 8ms 7 Jul 2024 223rd stefangimmillaro 822 162 595ms 6 Oct 2025 223rd MeWhenI 🇻🇦 822 162 451ms 7 Nov 2025 225th nwellnhof 🇩🇪 820 117 10ms 25 May 2023 225th quirked-up 820 117 9ms 31 Aug 2023 225th KrausRaus 🇺🇸 820 117 9ms 3 Nov 2023 225th Steffan153 🇫🇮 820 117 9ms 27 May 2024 229th edsrzf 🇳🇿 820 160 7ms 9 hours ago 230th nwellnhof 🇩🇪 818 140 85ms 6 May 2023 231st primo-ppcg 🇹🇭 818 307 11ms 3 Aug 2023 232nd dokutan 816 81 1ms 7 Sep 2023 233rd plcc0 815 100 11ms 9 Oct 2025 234th the-zammers 815 158 122ms 10 Nov 2023 234th tobeannouncd 815 158 148ms 12 Jan 2024 236th Shanethegamer 🇺🇸 814 158 480ms 14 Jul 2023 237th JDiLenarda 🇫🇷 814 177 1,376ms 26 Jun 2025 238th LukeBridges 🇬🇧 813 118 9ms 20 Sep 2024 238th snoozingnewt 🇨🇦 813 118 9ms 31 Oct 2025 240th KasperKivimaeki 🇫🇮 812 141 71ms 2 Nov 2025 First Prev 161–240 of 828 Next Last