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 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 161st sean-niemann 🇺🇸 869 158 2ms 19 Nov 2025 162nd emgordon154 868 96 4ms 11 Oct 2024 162nd sean-niemann 🇺🇸 868 96 4ms 11 Jan 2025 164th primo-ppcg 🇹🇭 868 138 70ms 29 Sep 2023 164th Kacarott 🇦🇺 868 138 69ms 16 Sep 2024 166th nwellnhof 🇩🇪 868 184 274ms 6 May 2023 167th xsot 🇸🇬 867 124 6ms 20 Apr 2025 168th Salutations45 866 96 1ms 22 Jan 2025 169th MarcMush 🇫🇷 866 100 1,058ms 16 Sep 2024 170th GrayJoKing 🇦🇺 866 131 13ms 25 May 2023 170th annaproxy 866 131 13ms 13 Jun 2023 172nd Shanethegamer 🇺🇸 866 132 15ms 1 May 2023 172nd prplz 🇦🇺 866 132 9ms 12 May 2023 172nd uttumuttu 🇫🇮 866 132 9ms 22 Dec 2023 172nd sean-niemann 🇺🇸 866 132 9ms 27 Jan 2025 172nd edsrzf 🇳🇿 866 132 10ms 8 days ago 177th Shanethegamer 🇺🇸 866 147 102ms 3 May 2023 178th coreynash 865 129 9ms 12 Oct 2023 178th targrik 865 129 8ms 9 Jun 2025 180th edsrzf 🇳🇿 865 192 27ms 26 Apr 2025 181st MeWhenI 🇻🇦 863 141 6ms 15 Jun 2023 182nd acotis 863 201 190ms 16 Apr 2025 183rd nwellnhof 🇩🇪 862 140 85ms 6 May 2023 184th primo-ppcg 🇹🇭 862 182 41ms 4 May 2025 185th DialFrost 🇸🇬 860 133 101ms 17 days ago 186th MeWhenI 🇻🇦 860 148 99ms 7 Aug 2023 187th kg583 🇺🇸 860 187 40ms 23 Jun 2025 188th uttumuttu 🇫🇮 859 130 9ms 22 Dec 2023 189th annaproxy 859 133 9ms 1 May 2023 189th duckyluuk 🇳🇱 859 133 10ms 20 Mar 2024 189th ryyyn 🇺🇸 859 133 9ms 18 Jan 2025 192nd Steffan153 🇫🇮 859 149 1ms 24 May 2023 193rd canissimia 🇦🇶 857 197 2ms 28 Aug 2023 194th MeWhenI 🇻🇦 856 99 986ms 13 Jul 2024 194th edsrzf 🇳🇿 856 99 1,136ms 31 Aug 2025 196th KasperKivimaeki 🇫🇮 856 141 71ms 2 Nov 2025 197th nwellnhof 🇩🇪 853 124 398ms 10 May 2023 198th lifthrasiir 🇰🇷 853 134 31ms 20 Nov 2024 198th kg583 🇺🇸 853 134 11ms 22 Dec 2024 200th DialFrost 🇸🇬 853 159 448ms 24 Sep 2025 200th CaedenHarper 🇨🇦 853 159 474ms 4 Oct 2025 202nd GrayJoKing 🇦🇺 852 152 371ms 24 Jul 2025 203rd Steffan153 🇫🇮 851 104 2ms 2 May 2023 204th m-tkach 🇺🇦 850 193 28ms 13 May 2023 205th MeWhenI 🇻🇦 849 145 10ms 29 Dec 2024 206th edsrzf 🇳🇿 849 228 1,616ms 17 Jun 2025 207th Steffan153 🇫🇮 848 151 4ms 20 Aug 2023 208th edsrzf 🇳🇿 847 127 5ms 25 Jul 2025 209th Shanethegamer 🇺🇸 846 132 9ms 4 May 2023 210th AlephSquirrel 845 158 6ms 23 Jan 2025 211th dokutan 843 105 1ms 7 Sep 2023 212th stefangimmillaro 843 151 103ms 23 May 2025 213th Steffan153 🇫🇮 843 197 31ms 9 May 2023 214th pardouin 🇫🇷 842 115 605ms 25 Jun 2024 215th MichalMarsalek 🇨🇿 841 154 368ms 2 Jun 2023 216th ovs-code 🇩🇪 840 103 600ms 16 Feb 2024 217th ovs-code 🇩🇪 840 135 14ms 1 Jul 2024 218th CornerMercury 🇬🇧 840 136 10ms 23 Sep 2023 218th ndren 840 136 10ms 27 Nov 2023 220th m-tkach 🇺🇦 840 193 2ms 4 Mar 2025 221st janbehrens 🇩🇪 839 133 9ms 17 Jun 2023 222nd MeWhenI 🇻🇦 837 162 451ms 7 Nov 2025 222nd h3ra993huskp 🇯🇵 837 162 470ms 19 days ago 224th edsrzf 🇳🇿 835 160 7ms 10 hours ago 225th edsrzf 🇳🇿 834 82 33ms 2 Sep 2025 226th bricknellj 834 137 9ms 9 Jul 2024 226th DialFrost 🇸🇬 834 137 9ms 16 Aug 2024 226th Artemis21 🇬🇧 834 137 10ms 18 Jan 2025 226th Mabeloid 🇳🇴 834 137 9ms 4 May 2025 226th CaedenHarper 🇨🇦 834 137 11ms 11 Aug 2025 231st edsrzf 🇳🇿 834 168 2ms 26 Jul 2025 232nd namelessiw 833 127 382ms 30 Oct 2024 233rd voytxt 🇨🇿 833 134 9ms 23 days ago 234th ovs-code 🇩🇪 833 145 85ms 3 Jun 2024 235th albanian-laundromat 833 336 510ms 24 Oct 2025 236th emgordon154 831 102 948ms 11 Aug 2024 236th anter69 🇭🇺 831 102 929ms 7 Oct 2024 238th nwellnhof 🇩🇪 831 121 1ms 6 May 2023 239th jared-hughes 830 283 8ms 7 Jul 2024 240th snoozingnewt 🇨🇦 829 138 96ms 14 days ago First Prev 161–240 of 832 Next Last