The Calendar hole will go live in approximately 9 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 320th FEZfan 🇦🇺 599 124 552ms 26 Apr 2025 322nd ImpressedByRocks 599 134 27ms 29 Apr 2025 322nd 051 🇸🇬 599 134 34ms 3 days ago 324th TheZwierzLF 🇵🇱 595 98 71ms 25 hours ago 325th madex 🇩🇪 595 135 26ms 13 Feb 2025 325th KasperKivimaeki 🇫🇮 595 135 25ms 3 Jul 2025 325th amberzit 595 135 24ms 6 Jul 2025 325th blaztoma 🇱🇹 595 135 21ms 13 Nov 2025 329th BREMAUCY 🇫🇷 589 99 67ms 4 Nov 2025 330th rucin93 🇵🇱 589 124 149ms 9 May 2025 331st DialFrost 🇸🇬 589 126 572ms 18 Feb 2025 332nd h3ra993huskp 🇯🇵 587 274 495ms 22 days ago 333rd snoozingnewt 🇨🇦 587 306 291ms 30 Oct 2025 334th MeWhenI 🇻🇦 585 127 453ms 25 Jun 2025 335th AlephSquirrel 579 234 496ms 1 Apr 2025 336th snoozingnewt 🇨🇦 578 101 54ms 30 Oct 2025 337th Lv0Sys 🇵🇱 575 156 16ms 12 days ago 338th emgordon154 574 133 1,063ms 14 May 2025 339th hiichbindermax 574 140 23ms 22 May 2025 339th Artemis21 🇬🇧 574 140 30ms 23 May 2025 339th andrewjc2000 574 140 25ms 15 Jul 2025 339th CaedenHarper 🇨🇦 574 140 30ms 29 Jul 2025 343rd snoozingnewt 🇨🇦 572 136 899ms 30 Oct 2025 344th dirckvdende 569 141 33ms 10 Jul 2025 345th mousetail 🇳🇱 569 272 246ms 27 Mar 2025 346th emgordon154 569 388 1,676ms 17 Sep 2025 347th targrik 568 158 49ms 7 May 2025 348th stefangimmillaro 568 280 44ms 7 May 2025 349th zt14427 565 142 27ms 20 Apr 2025 350th Shanethegamer 🇺🇸 564 159 30ms 30 Mar 2025 351st MeWhenI 🇻🇦 564 391 1,895ms 18 Nov 2025 352nd SirBogman 🇺🇸 559 145 3,550ms 5 Jul 2025 353rd DanielVenable 557 161 15ms 26 Mar 2025 354th moustave 554 145 30ms 16 Apr 2025 354th za3k 554 145 32ms 17 Apr 2025 356th Salutations45 551 163 14ms 11 Apr 2025 357th MeWhenI 🇻🇦 549 240 522ms 5 Apr 2025 358th CaedenHarper 🇨🇦 546 136 706ms 4 Apr 2025 359th DialFrost 🇸🇬 545 107 67ms 26 Mar 2025 360th Bmrl7 543 148 23ms 30 Aug 2025 361st annaproxy 542 221 394ms 2 Apr 2025 361st tomh1012 542 221 437ms 26 Aug 2025 363rd Jacob385 541 297 395ms 31 Mar 2025 364th Chinay-Domitrix 🇺🇸 540 188 4,868ms 28 Mar 2025 365th ShiraJoseph 🇺🇸 537 167 15ms 26 Apr 2025 366th JDiLenarda 🇫🇷 537 264 1,425ms 7 Apr 2025 367th Ripick 535 237 345ms 24 Apr 2025 368th Andriamanitra 🇫🇮 532 151 30ms 29 Mar 2025 369th klixel 🇨🇦 528 152 332ms 5 Apr 2025 370th tayloia 🇬🇧 528 170 12ms 7 Apr 2025 371st aksyristos 521 154 25ms 21 Mar 2025 372nd snoozingnewt 🇨🇦 518 286 64ms 30 Oct 2025 373rd mousetail 🇳🇱 513 247 2ms 28 Mar 2025 374th FortuiteMan 🇫🇷 511 157 18ms 20 Jun 2025 375th snoozingnewt 🇨🇦 511 248 110ms 30 Oct 2025 376th jared-hughes 510 176 15ms 6 Apr 2025 376th Sakisan 🇧🇪 510 176 142ms 11 Apr 2025 378th FEZfan 🇦🇺 510 250 39ms 22 Apr 2025 379th calebaitken 505 159 22ms 10 Apr 2025 379th Yewzir 🇧🇪 505 159 19ms 17 Nov 2025 381st jameswmccarty 502 160 17ms 27 Mar 2025 382nd snoozingnewt 🇨🇦 501 253 449ms 30 Oct 2025 383rd didion0 🇺🇸 496 181 20ms 30 May 2025 383rd JOrE20 🇺🇸 496 181 11ms 20 days ago 385th MeWhenI 🇻🇦 489 245 402ms 5 Apr 2025 386th CaedenHarper 🇨🇦 488 184 17ms 30 Aug 2025 387th helbling 🇨🇭 480 187 13ms 26 Mar 2025 388th msbranicky 475 169 20ms 26 Mar 2025 389th targrik 474 206 477ms 4 Jul 2025 390th Protothor 472 190 12ms 26 Jul 2025 391st CaedenHarper 🇨🇦 472 254 389ms 17 Oct 2025 392nd TheZwierzLF 🇵🇱 470 171 30ms 15 days ago 393rd TheZwierzLF 🇵🇱 467 159 547ms 8 days ago 394th Apataras 467 344 368ms 23 Jul 2025 395th ericlangedijk 🇸🇮 465 258 399ms 3 Apr 2025 396th IISResetMe 458 177 3,201ms 26 Mar 2025 397th CLOStrophobic 🇮🇹 456 176 23ms 14 Apr 2025 398th coldham10 451 178 29ms 28 Jun 2025 399th snoozingnewt 🇨🇦 449 345 245ms 30 Oct 2025 400th snoozingnewt 🇨🇦 442 271 425ms 30 Oct 2025 First Prev 321–400 of 462 Next Last