The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Set 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 🇨🇦 770 125 378ms 20 Nov 2025 242nd emgordon154 770 201 226ms 4 Jun 2025 243rd edsrzf 🇳🇿 769 209 693ms 24 Sep 2025 244th 2bular 767 43 171ms 1 Apr 2025 245th keelimeguy 🇺🇸 766 146 40ms 7 May 2025 245th FlorianCassayre 🇫🇷 766 146 27ms 5 Aug 2025 247th DialFrost 🇸🇬 764 126 572ms 18 Feb 2025 248th edsrzf 🇳🇿 760 131 26ms 21 Apr 2025 249th FEZfan 🇦🇺 760 167 448ms 21 Apr 2025 250th saito-ta 🇯🇵 759 167 2ms 31 Mar 2025 251st acotis 759 204 262ms 3 Jun 2025 252nd MeWhenI 🇻🇦 758 127 453ms 25 Jun 2025 253rd Bmrl7 756 148 23ms 30 Aug 2025 254th Yax42 🇫🇷 754 159 424ms 15 Apr 2025 255th keelimeguy 🇺🇸 751 239 268ms 27 Apr 2025 256th SirBogman 🇺🇸 750 44 74ms 26 Mar 2025 257th sean-niemann 🇺🇸 749 170 139ms 21 Apr 2025 258th error256 746 170 133ms 24 Apr 2025 259th Andriamanitra 🇫🇮 741 151 30ms 29 Mar 2025 259th rucin93 🇵🇱 741 151 25ms 15 Apr 2025 261st klixel 🇨🇦 736 152 332ms 5 Apr 2025 262nd Shanethegamer 🇺🇸 736 157 82ms 27 Mar 2025 263rd edsrzf 🇳🇿 735 133 42ms 11 Apr 2025 264th ovs-code 🇩🇪 733 173 2ms 31 Mar 2025 265th Shanethegamer 🇺🇸 732 155 707ms 29 Mar 2025 266th dokutan 731 153 25ms 28 Mar 2025 267th error256 731 182 226ms 27 Apr 2025 268th stefangimmillaro 730 212 262ms 4 Jun 2025 269th SirBogman 🇺🇸 728 92 54ms 19 Jul 2025 270th aksyristos 726 154 25ms 21 Mar 2025 271st DialFrost 🇸🇬 725 114 1,102ms 23 Jun 2025 272nd pardouin 🇫🇷 725 175 134ms 4 Apr 2025 273rd ovs-code 🇩🇪 725 193 63ms 30 Mar 2025 274th DialFrost 🇸🇬 724 240 753ms 15 Jul 2025 275th edsrzf 🇳🇿 722 166 418ms 2 Jun 2025 276th mousetail 🇳🇱 721 106 1,473ms 1 Apr 2025 277th albanian-laundromat 720 123 977ms 3 Nov 2025 278th Mukundan314 720 176 9ms 25 days ago 279th JunkIce 718 134 591ms 9 Jul 2025 280th Mukundan314 718 195 65ms 28 Apr 2025 280th snyderek 🇺🇸 718 195 59ms 3 May 2025 282nd edsrzf 🇳🇿 717 216 213ms 2 Apr 2025 283rd CaedenHarper 🇨🇦 716 251 259ms 10 Nov 2025 284th emgordon154 715 142 4,380ms 31 May 2025 285th Shanethegamer 🇺🇸 714 109 914ms 27 Mar 2025 286th FortuiteMan 🇫🇷 712 157 18ms 20 Jun 2025 286th yujqiao 712 157 31ms 3 days ago 288th edsrzf 🇳🇿 709 160 600ms 27 Apr 2025 289th AdrienHache 🇫🇷 709 169 440ms 12 Aug 2025 290th xsot 🇸🇬 708 119 66ms 13 Apr 2025 291st CaedenHarper 🇨🇦 707 136 706ms 4 Apr 2025 292nd tailorspy 707 198 63ms 5 May 2025 293rd stefangimmillaro 707 254 293ms 9 May 2025 294th Shanethegamer 🇺🇸 706 152 42ms 6 Apr 2025 295th olleicua 🇺🇸 705 95 65ms 22 Apr 2025 296th albanian-laundromat 705 524 13ms 8 days ago 297th calebaitken 703 159 22ms 10 Apr 2025 298th edsrzf 🇳🇿 701 145 3,970ms 21 Apr 2025 299th ovs-code 🇩🇪 700 172 187ms 4 Apr 2025 300th jameswmccarty 699 160 17ms 27 Mar 2025 301st emgordon154 698 96 83ms 27 Mar 2025 302nd duckyluuk 🇳🇱 698 137 271ms 15 Apr 2025 303rd error256 697 177 545ms 24 Apr 2025 304th Andriamanitra 🇫🇮 697 180 165ms 29 Mar 2025 305th emgordon154 695 60 2,181ms 14 Nov 2025 306th Lv0Sys 🇵🇱 693 259 248ms 9 days ago 307th Shanethegamer 🇺🇸 691 97 94ms 13 Feb 2025 308th stefangimmillaro 689 174 432ms 4 Jun 2025 309th DialFrost 🇸🇬 682 114 371ms 24 Jun 2025 310th SirBogman 🇺🇸 680 145 3,550ms 5 Jul 2025 311th BlankSpruce 679 206 69ms 14 Apr 2025 312th BREMAUCY 🇫🇷 677 99 67ms 4 Nov 2025 313th kg583 🇺🇸 677 244 75ms 28 Mar 2025 314th Shanethegamer 🇺🇸 675 210 1,457ms 27 Mar 2025 315th snoozingnewt 🇨🇦 671 187 183ms 30 Oct 2025 316th jerrandolph 665 270 279ms 24 Sep 2025 317th DanielVenable 664 189 233ms 26 Mar 2025 318th anter69 🇭🇺 663 101 486ms 24 Mar 2025 318th snoozingnewt 🇨🇦 663 101 54ms 30 Oct 2025 320th dmrichwa 🇺🇸 663 150 27ms 24 May 2025 First Prev 241–320 of 462 Next Last