The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Hexdump 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 481st AlephSquirrel 672 178 716ms 21 Jan 2024 481st Babafaba 672 178 521ms 29 Oct 2025 483rd emgordon154 672 222 481ms 30 May 2025 484th myleopard 670 199 10ms 25 Dec 2022 484th PyryL 🇫🇮 670 199 10ms 21 Aug 2024 484th andrewjc2000 670 199 16ms 13 Aug 2025 487th MeWhenI 🇻🇦 668 223 528ms 17 Apr 2024 488th DialFrost 🇸🇬 668 225 3ms 3 Jul 2024 488th Lv0Sys 🇵🇱 668 225 3ms 12 days ago 490th duckyluuk 🇳🇱 665 180 481ms 28 Mar 2024 491st MeWhenI 🇻🇦 665 246 381ms 30 Jan 2023 492nd h3ra993huskp 🇯🇵 665 310 458ms 18 days ago 493rd Heathcorp 🇦🇺 664 201 11ms 12 Aug 2023 493rd stefangimmillaro 664 201 10ms 9 May 2024 495th kkoenig 664 289 276ms 1 Jan 2024 496th max-barstow 661 142 44ms 23 Sep 2022 497th Yewzir 🇧🇪 660 249 61ms 29 Dec 2023 498th unfinishedprogram 660 257 9ms 16 Sep 2023 499th MeWhenI 🇻🇦 659 207 553ms 15 Feb 2023 500th ericlangedijk 🇸🇮 659 232 357ms 5 May 2022 500th stefangimmillaro 659 232 437ms 15 Jun 2025 502nd ian-h-chamberlain 🇺🇸 659 302 200ms 22 Jun 2022 503rd shinh 657 143 41ms 25 Jun 2022 504th Natanaelel 🇸🇪 657 203 15ms 24 Nov 2023 505th MeWhenI 🇻🇦 657 228 136ms 3 Aug 2024 506th Natanaelel 🇸🇪 657 291 145ms 28 Jul 2025 507th Phil-RGOMEGA 655 247 2ms 23 Aug 2023 508th osmith93 655 251 95ms 10 Jul 2022 509th albanian-laundromat 653 283 44ms 6 Nov 2025 510th dokutan 650 210 262ms 15 Feb 2024 511th emgordon154 650 231 3ms 6 Apr 2025 512th sean-niemann 🇺🇸 650 253 2,837ms 16 Oct 2024 513th 4hg 🇺🇸 648 145 39ms 25 Jan 2023 514th MeWhenI 🇻🇦 648 230 134ms 15 Dec 2022 515th junkondo-jp 648 262 11ms 31 May 2024 516th qpwoeirut 647 206 11ms 2 Nov 2025 517th Heathcorp 🇦🇺 647 232 3ms 12 Aug 2023 517th snoozingnewt 🇨🇦 647 232 3ms 23 Sep 2023 517th dokutan 647 232 3ms 14 Jul 2025 520th snoozingnewt 🇨🇦 647 358 674ms 20 Nov 2025 521st CaedenHarper 🇨🇦 645 263 9ms 16 Sep 2025 522nd kmathis22 645 320 407ms 14 days ago 523rd yzhs 🇩🇪 644 207 10ms 31 May 2022 523rd Masttest 644 207 14ms 14 Feb 2024 523rd KatieLG 🇬🇧 644 207 10ms 11 Oct 2025 526th Yewzir 🇧🇪 644 226 142ms 20 Jun 2024 527th jerrandolph 644 298 267ms 20 Oct 2023 528th CatsAreFluffy 642 256 79ms 25 Jan 2023 529th Yewzir 🇧🇪 639 323 474ms 2 Oct 2025 530th Ripick 637 257 368ms 29 Jan 2023 531st arctouch-cristiannevianna 635 241 359ms 20 Nov 2023 532nd knutae 🇳🇴 632 211 9ms 30 Dec 2023 532nd alemelis 632 211 13ms 11 Oct 2024 534th MeWhenI 🇻🇦 632 370 38ms 6 Jun 2023 535th MeWhenI 🇻🇦 629 368 56ms 25 Jul 2024 536th jared-hughes 626 150 43ms 12 Sep 2022 537th amollberg 🇸🇪 626 213 11ms 14 Jan 2024 537th frankgraziano 626 213 10ms 2 Mar 2025 539th jfallon1997 623 214 10ms 17 Aug 2022 539th m42km 623 214 11ms 11 Jan 2024 539th FranklinJiaChen 623 214 10ms 5 Aug 2024 542nd michelebastione 🇮🇹 619 247 421ms 3 Sep 2025 543rd CaedenHarper 🇨🇦 619 310 281ms 3 Nov 2025 544th violeta-desantis 618 243 3ms 14 Apr 2024 545th Xzyaihni 618 322 216ms 16 Oct 2022 546th croc54 617 216 12ms 8 Jan 2025 547th jgbaldwinbrown 616 244 3ms 16 Jun 2022 548th janbehrens 🇩🇪 615 222 826ms 10 May 2022 549th Argeento 🇵🇱 615 276 10ms 9 Sep 2023 550th KatieLG 🇬🇧 613 277 9ms 19 May 2022 551st SirFireball3521 608 154 256ms 26 Feb 2024 552nd snoozingnewt 🇨🇦 608 245 182ms 14 Oct 2023 553rd dillon-duncando 606 220 11ms 5 Oct 2022 554th madex 🇩🇪 603 221 11ms 9 Jul 2024 554th abhishekg999 603 221 11ms 21 Sep 2024 554th FortuiteMan 🇫🇷 603 221 12ms 10 Oct 2024 554th LostSyntax21 🇬🇧 603 221 16ms 2 Dec 2024 554th Troon 603 221 10ms 28 Feb 2025 554th Flekay 🇩🇪 603 221 13ms 19 Jun 2025 560th MeWhenI 🇻🇦 601 175 294ms 28 Jan 2023 First Prev 481–560 of 822 Next Last