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 321st msbranicky 662 169 20ms 26 Mar 2025 322nd MeWhenI 🇻🇦 659 244 522ms 7 Nov 2025 323rd CLOStrophobic 🇮🇹 658 212 3,887ms 22 Apr 2025 324th KatieLG 🇬🇧 657 102 96ms 2 Apr 2025 325th emgordon154 655 152 18ms 4 Jun 2025 326th error256 655 303 70ms 25 Apr 2025 327th TheZwierzLF 🇵🇱 654 171 30ms 12 days ago 328th Shanethegamer 🇺🇸 654 192 205ms 27 Mar 2025 329th emgordon154 653 177 161ms 27 Mar 2025 330th edsrzf 🇳🇿 652 202 166ms 27 Apr 2025 331st dokutan 650 148 848ms 28 Mar 2025 332nd RaBa21 🇭🇺 650 172 26ms 21 Jul 2025 333rd anter69 🇭🇺 648 120 1,227ms 1 Apr 2025 334th SirBogman 🇺🇸 643 73 342ms 10 Jul 2025 335th snoozingnewt 🇨🇦 641 129 768ms 12 days ago 336th albanian-laundromat 639 232 139ms 10 Aug 2025 337th Lv0Sys 🇵🇱 638 156 16ms 8 days ago 338th error256 637 282 279ms 25 Apr 2025 339th CLOStrophobic 🇮🇹 635 176 23ms 14 Apr 2025 340th sean-niemann 🇺🇸 635 253 511ms 3 hours ago 341st targrik 630 158 49ms 7 May 2025 342nd coldham10 628 178 29ms 28 Jun 2025 343rd DialFrost 🇸🇬 626 107 67ms 26 Mar 2025 344th Shanethegamer 🇺🇸 626 159 30ms 30 Mar 2025 345th CaedenHarper 🇨🇦 625 257 467ms 6 Oct 2025 346th namelessiw 624 192 463ms 1 Aug 2025 347th CaedenHarper 🇨🇦 619 143 848ms 2 Oct 2025 348th DanielVenable 618 161 15ms 26 Mar 2025 349th Natanaelel 🇸🇪 617 108 1,062ms 26 Mar 2025 350th m-tkach 🇺🇦 615 263 42ms 8 May 2025 351st emgordon154 611 54 18ms 18 Nov 2025 352nd Salutations45 610 163 14ms 11 Apr 2025 353rd snoozingnewt 🇨🇦 607 217 140ms 20 Nov 2025 354th kmathis22 607 265 463ms 11 Oct 2025 355th Salutations45 606 139 61ms 12 Apr 2025 356th TheZwierzLF 🇵🇱 605 159 547ms 4 days ago 357th error256 600 163 32ms 15 Apr 2025 358th DialFrost 🇸🇬 600 268 518ms 24 Sep 2025 359th ShiraJoseph 🇺🇸 596 167 15ms 26 Apr 2025 360th AlephSquirrel 596 234 496ms 1 Apr 2025 361st vhoulbreque 🇫🇷 592 189 129ms 12 Nov 2025 362nd Alban-Boissard 589 190 24ms 14 Jun 2025 362nd CatsAreFluffy 589 190 19ms 30 Oct 2025 364th h3ra993huskp 🇯🇵 587 274 495ms 18 days ago 365th snoozingnewt 🇨🇦 587 306 291ms 30 Oct 2025 366th tayloia 🇬🇧 585 170 12ms 7 Apr 2025 367th guilhem-roy 🇫🇷 582 192 27ms 26 days ago 368th madeforlosers 575 173 683ms 7 Apr 2025 369th emgordon154 574 133 1,063ms 14 May 2025 370th snoozingnewt 🇨🇦 572 136 899ms 30 Oct 2025 371st mousetail 🇳🇱 569 272 246ms 27 Mar 2025 372nd emgordon154 569 388 1,676ms 17 Sep 2025 373rd stefangimmillaro 568 280 44ms 7 May 2025 374th jared-hughes 565 176 15ms 6 Apr 2025 374th Sakisan 🇧🇪 565 176 142ms 11 Apr 2025 376th MeWhenI 🇻🇦 564 391 1,895ms 18 Nov 2025 377th RobertHoeh 559 200 25ms 19 Apr 2025 378th IISResetMe 557 177 3,201ms 26 Mar 2025 379th didion0 🇺🇸 550 181 20ms 30 May 2025 380th MeWhenI 🇻🇦 549 240 522ms 5 Apr 2025 381st HumanoidCPU 545 205 34ms 29 Mar 2025 381st undefinedRyan 545 205 47ms 19 Apr 2025 381st asherdiamond 545 205 18ms 13 Aug 2025 384th annaproxy 542 221 394ms 2 Apr 2025 384th tomh1012 542 221 437ms 26 Aug 2025 386th CaedenHarper 🇨🇦 541 184 17ms 30 Aug 2025 387th Jacob385 541 297 395ms 31 Mar 2025 388th Chinay-Domitrix 🇺🇸 540 188 4,868ms 28 Mar 2025 389th JDiLenarda 🇫🇷 537 264 1,425ms 7 Apr 2025 390th Ripick 535 237 345ms 24 Apr 2025 391st helbling 🇨🇭 532 187 13ms 26 Mar 2025 392nd Protothor 524 190 12ms 26 Jul 2025 393rd snoozingnewt 🇨🇦 518 286 64ms 30 Oct 2025 394th mousetail 🇳🇱 513 247 2ms 28 Mar 2025 395th snoozingnewt 🇨🇦 511 248 110ms 30 Oct 2025 396th FEZfan 🇦🇺 510 250 39ms 22 Apr 2025 397th HumanoidCPU 506 190 546ms 29 Mar 2025 398th snoozingnewt 🇨🇦 501 253 449ms 30 Oct 2025 399th mbittner20 497 225 17ms 1 Apr 2025 400th MeWhenI 🇻🇦 489 245 402ms 5 Apr 2025 First Prev 321–400 of 462 Next Last