The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Set 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 161st GrayJoKing 🇦🇺 788 74 86ms 1 Apr 2025 161st error256 788 74 49ms 8 May 2025 163rd dokutan 787 102 24ms 9 Apr 2025 164th AlephSquirrel 785 234 6ms 14 May 2025 165th MeWhenI 🇻🇦 783 818 2,618ms 18 Nov 2025 166th error256 782 207 68ms 25 Apr 2025 167th m-tkach 🇺🇦 782 254 69ms 26 Apr 2025 168th pardouin 🇫🇷 781 158 522ms 3 Apr 2025 169th error256 780 115 19ms 27 Apr 2025 170th edsrzf 🇳🇿 778 100 815ms 2 Jun 2025 171st UnderKoen 🇳🇱 775 326 1,998ms 26 Mar 2025 172nd edsrzf 🇳🇿 774 175 141ms 18 Apr 2025 173rd edsrzf 🇳🇿 773 208 693ms 24 Sep 2025 173rd stefangimmillaro 773 208 671ms 6 Oct 2025 175th snoozingnewt 🇨🇦 772 209 115ms 11 days ago 176th canissimia 🇦🇶 772 374 67ms 11 Apr 2025 177th emgordon154 770 201 226ms 4 Jun 2025 178th 2bular 767 43 171ms 1 Apr 2025 179th anter69 🇭🇺 767 76 631ms 24 Mar 2025 179th stefangimmillaro 767 76 63ms 8 Apr 2025 181st dmrichwa 🇺🇸 761 118 28ms 24 May 2025 182nd FEZfan 🇦🇺 760 167 448ms 21 Apr 2025 183rd albanian-laundromat 760 195 25ms 6 Jul 2025 184th saito-ta 🇯🇵 759 167 2ms 31 Mar 2025 185th acotis 759 204 262ms 3 Jun 2025 186th emgordon154 754 119 18ms 4 Jun 2025 187th Yax42 🇫🇷 754 159 424ms 15 Apr 2025 188th keelimeguy 🇺🇸 751 239 268ms 27 Apr 2025 189th SirBogman 🇺🇸 750 44 74ms 26 Mar 2025 190th sean-niemann 🇺🇸 749 170 139ms 21 Apr 2025 191st KatieLG 🇬🇧 747 78 70ms 2 Oct 2025 192nd error256 746 170 133ms 24 Apr 2025 193rd emplv 🇱🇻 742 121 18ms 20 Apr 2025 194th error256 737 99 1,005ms 24 Apr 2025 195th Natanaelel 🇸🇪 736 122 23ms 30 Mar 2025 195th ovs-code 🇩🇪 736 122 217ms 1 Apr 2025 197th Shanethegamer 🇺🇸 736 157 82ms 27 Mar 2025 198th edsrzf 🇳🇿 735 133 42ms 11 Apr 2025 199th ovs-code 🇩🇪 733 173 2ms 31 Mar 2025 200th Shanethegamer 🇺🇸 732 155 707ms 29 Mar 2025 201st error256 731 182 226ms 27 Apr 2025 202nd kg583 🇺🇸 730 184 60ms 28 Mar 2025 203rd stefangimmillaro 730 212 262ms 4 Jun 2025 204th dokutan 728 102 500ms 9 Apr 2025 205th pardouin 🇫🇷 725 175 134ms 4 Apr 2025 206th ovs-code 🇩🇪 725 193 63ms 30 Mar 2025 207th DialFrost 🇸🇬 724 240 753ms 15 Jul 2025 208th RaBa21 🇭🇺 723 111 26ms 21 Jul 2025 209th edsrzf 🇳🇿 722 166 418ms 2 Jun 2025 210th mousetail 🇳🇱 721 106 1,473ms 1 Apr 2025 211th Mukundan314 718 195 65ms 28 Apr 2025 211th snyderek 🇺🇸 718 195 59ms 3 May 2025 213th yujqiao 717 112 33ms 2 days ago 214th edsrzf 🇳🇿 717 216 213ms 2 Apr 2025 215th CaedenHarper 🇨🇦 716 251 259ms 10 Nov 2025 216th emgordon154 715 142 4,380ms 31 May 2025 217th Shanethegamer 🇺🇸 714 109 914ms 27 Mar 2025 218th AdrienHache 🇫🇷 714 168 440ms 12 Aug 2025 219th edsrzf 🇳🇿 709 160 600ms 27 Apr 2025 220th xsot 🇸🇬 708 119 66ms 13 Apr 2025 221st zacjl 707 105 754ms 22 Oct 2025 222nd tailorspy 707 198 63ms 5 May 2025 223rd stefangimmillaro 707 254 293ms 9 May 2025 224th Shanethegamer 🇺🇸 706 152 42ms 6 Apr 2025 225th albanian-laundromat 705 524 13ms 7 days ago 226th edsrzf 🇳🇿 701 145 3,970ms 21 Apr 2025 227th ovs-code 🇩🇪 700 172 187ms 4 Apr 2025 228th duckyluuk 🇳🇱 698 137 271ms 15 Apr 2025 229th error256 697 177 545ms 24 Apr 2025 230th Andriamanitra 🇫🇮 697 180 165ms 29 Mar 2025 231st Lv0Sys 🇵🇱 693 259 248ms 8 days ago 232nd madeforlosers 690 130 677ms 7 Apr 2025 233rd stefangimmillaro 689 174 432ms 4 Jun 2025 234th ovs-code 🇩🇪 688 108 4,871ms 29 Mar 2025 235th edsrzf 🇳🇿 685 131 26ms 21 Apr 2025 236th error256 680 118 28ms 27 Apr 2025 236th orthoplex 🇨🇽 680 118 29ms 3 Jun 2025 236th ovs-code 🇩🇪 680 118 31ms 17 Nov 2025 239th BlankSpruce 679 206 69ms 14 Apr 2025 240th Kacarott 🇦🇺 675 126 627ms 6 Apr 2025 First Prev 161–240 of 461 Next Last