The Calendar hole will go live in approximately 8 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 641st ComputerKWasTaken 🇺🇸 523 255 11ms 21 Jan 2025 642nd retrohun 523 287 2ms 30 Dec 2022 643rd janAkali 🇷🇺 523 313 374ms 8 May 2025 644th twocatsinatrenchcoat 521 256 10ms 24 Nov 2022 645th Ernest1338 520 383 183ms 7 Oct 2023 646th MeWhenI 🇻🇦 518 259 454ms 18 Nov 2023 647th c0d3-4-F00d 🇩🇪 513 293 2ms 4 May 2022 648th harperse 510 206 242ms 5 May 2023 649th Yewzir 🇧🇪 510 300 386ms 20 Jun 2024 650th Bonjour27891 🇻🇳 509 262 11ms 3 May 2022 650th JunkIce 509 262 17ms 7 Oct 2024 650th lokeshllkumar 509 262 16ms 26 Sep 2025 653rd jacklynnepenick 507 263 11ms 23 Jun 2022 654th scpchicken 🇵🇼 507 393 238ms 3 May 2022 655th joaosigma 🇵🇹 506 325 95ms 17 Sep 2025 656th adoxography 505 186 46ms 8 Aug 2022 657th SniperSmiley 🇺🇸 505 264 10ms 25 Jun 2022 657th LeeCamp 505 264 9ms 5 Jan 2023 659th Yewzir 🇧🇪 505 380 277ms 27 Oct 2023 660th Trunksistor 🇫🇷 503 265 11ms 23 May 2022 661st Jonatan6 🇩🇰 496 303 3ms 20 Mar 2024 662nd Macweese 495 332 85ms 1 Aug 2025 663rd dokutan 492 243 642ms 4 Jul 2024 664th dahrens 490 272 9ms 19 Nov 2025 665th jameswmccarty 487 274 10ms 10 Jul 2024 666th dokutan 487 299 147ms 7 Jul 2024 667th Mabeloid 🇳🇴 486 246 768ms 17 Sep 2024 668th aksyristos 483 276 10ms 23 Jan 2023 668th ThatAlo 483 276 13ms 12 Jun 2023 668th jmerle 🇳🇱 483 276 10ms 6 Jul 2023 671st andymac-2 482 195 49ms 7 Jul 2024 672nd Mikey-Beep 🇬🇧 480 278 10ms 6 Oct 2022 673rd KatieLG 🇬🇧 477 197 33ms 12 Jan 2025 674th emgordon154 474 198 43ms 15 Jun 2024 675th Yewzir 🇧🇪 474 320 12ms 27 Jan 2024 676th JunkIce 473 253 677ms 3 Dec 2024 677th eiburns 472 437 489ms 15 Dec 2022 677th Vaekor 472 437 432ms 3 Aug 2023 679th IISResetMe 471 223 314ms 2 Jun 2025 680th Bananapants22 470 284 9ms 22 Sep 2022 681st Natanaelel 🇸🇪 468 194 34ms 2 May 2024 682nd hamilton-bonds 468 285 9ms 12 Nov 2024 683rd calinous 🇷🇴 459 327 3ms 28 Feb 2023 684th hamhub7 459 333 364ms 10 Aug 2022 685th RaBa21 🇭🇺 457 292 17ms 17 Jul 2025 686th TheZwierzLF 🇵🇱 454 207 39ms 11 hours ago 687th evnu 453 392 81ms 2 Nov 2025 688th ridingqwerty 🇺🇸 451 296 10ms 29 Feb 2024 689th iczelia 🇩🇪 450 334 3ms 14 Oct 2025 690th MeWhenI 🇻🇦 444 363 2ms 26 Aug 2023 691st martinnorling 🇸🇪 444 417 15ms 4 May 2022 692nd bac0id 443 345 362ms 27 Sep 2023 693rd aevykt 442 340 2ms 30 Oct 2023 694th mrmena 🇦🇺 438 422 43ms 16 Apr 2024 695th AnnoyedArt1256 437 388 10ms 13 Aug 2022 696th CaedenHarper 🇨🇦 435 280 918ms 3 Oct 2025 697th josrepo 432 478 478ms 4 May 2025 698th gifti258 426 303 83ms 13 Sep 2023 699th juliansiebert 🇩🇪 424 248 267ms 6 Aug 2022 700th IlkkaTakala 419 392 2,807ms 28 Nov 2023 701st KatieLG 🇬🇧 416 368 405ms 22 Oct 2022 702nd JOrE20 🇺🇸 416 408 10ms 16 days ago 703rd msbranicky 414 546 7ms 28 Dec 2023 704th TaserTheFox 🇺🇸 411 256 288ms 2 Jun 2023 705th MeWhenI 🇻🇦 410 354 5ms 2 Oct 2022 706th shibacho 🇯🇵 408 327 10ms 2 Nov 2022 707th FlorianCassayre 🇫🇷 407 236 1,103ms 12 Sep 2023 708th arobson13 🇨🇦 397 316 5ms 10 Apr 2023 709th ComputerKWasTaken 🇺🇸 397 876 457ms 21 Jan 2025 710th aketawi 383 348 10ms 14 Feb 2023 711th dylanjones92 381 350 9ms 18 Jan 2024 712th CaedenHarper 🇨🇦 381 401 425ms 17 Oct 2025 713th jessegyger 380 330 5ms 17 Oct 2022 714th ravnskjaer 🇩🇰 367 562 385ms 7 days ago 715th Schmitt-Very-Cool 363 569 464ms 30 Sep 2025 716th Natanaelel 🇸🇪 351 222 3ms 2 May 2022 717th koipondx86 338 477 7ms 24 Nov 2025 718th atazzam 🇺🇸 318 420 11ms 10 Sep 2022 719th kevinnaviapaiva 309 432 10ms 18 Feb 2025 719th Upload-and-View 🇺🇦 309 432 10ms 25 Jul 2025 First Prev 641–720 of 822 Next Last