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 561st martinnorling 🇸🇪 601 222 10ms 4 May 2022 561st galloj 🇨🇿 601 222 11ms 28 Aug 2022 563rd speles 🇺🇦 601 250 2ms 8 Nov 2023 564th Alex-x90 🇺🇸 600 274 2,555ms 23 Jan 2023 565th RYNO8 595 224 11ms 16 Aug 2022 566th abba23 593 225 16ms 31 May 2022 567th m42km 592 202 611ms 3 Feb 2024 568th za3k 590 226 10ms 16 Oct 2022 569th mrmena 🇦🇺 590 286 2ms 14 May 2024 570th stefangimmillaro 590 379 46ms 13 Jul 2025 571st KatieLG 🇬🇧 590 393 728ms 15 Jan 2023 572nd MeWhenI 🇻🇦 589 213 6ms 28 May 2023 573rd msbranicky 588 227 9ms 12 Jul 2023 574th Yax42 🇫🇷 587 289 9ms 13 Nov 2025 575th luuumine 🇫🇷 585 228 10ms 22 Oct 2025 576th roupiq 🇵🇱 585 281 475ms 17 Apr 2024 577th MeWhenI 🇻🇦 584 257 3ms 9 May 2023 578th madeforlosers 583 291 10ms 8 Jan 2024 579th dokutan 581 261 10ms 22 Jun 2024 580th TobyBoyne 🇬🇧 580 230 10ms 1 May 2022 580th Pyroan 580 230 10ms 24 Feb 2025 582nd Maashau 580 259 2ms 19 days ago 583rd FlyingPenguin223 580 279 2ms 15 Dec 2024 584th rucin93 🇵🇱 579 259 141ms 31 Oct 2024 585th codewrite 🇬🇧 577 231 15ms 13 Jul 2025 586th JGDoerrer 577 345 190ms 12 Aug 2022 587th KatieLG 🇬🇧 575 208 543ms 14 Aug 2025 588th jeff-at-tamer-dot-codes 🇺🇸 575 232 11ms 26 Jul 2024 589th rifatx 575 266 445ms 26 Jul 2024 590th rowboat1 572 233 10ms 14 Jun 2022 591st MeWhenI 🇻🇦 572 278 18ms 10 Jan 2025 592nd MeWhenI 🇻🇦 572 298 45ms 4 Sep 2024 593rd te-chnical 570 234 10ms 18 Nov 2025 594th msbranicky 570 296 5ms 13 Oct 2023 595th Re-Adventures 🇮🇳 569 350 182ms 19 Jan 2025 596th jbjd 568 235 18ms 23 Nov 2024 597th MostParsingVex 568 280 30ms 25 Sep 2024 598th CaedenHarper 🇨🇦 568 363 559ms 7 Oct 2025 599th bobbysq 565 236 13ms 6 Jul 2023 599th jtaxen 565 236 11ms 12 Apr 2024 599th HumanoidCPU 565 236 10ms 18 Feb 2025 602nd MeWhenI 🇻🇦 564 267 4ms 23 May 2023 603rd CedricGebistorf 563 237 10ms 9 May 2022 603rd inverseLorentz 🇦🇺 563 237 9ms 19 Oct 2023 605th Andriamanitra 🇫🇮 562 167 39ms 20 Jul 2022 606th janbehrens 🇩🇪 562 223 8ms 2 Jul 2023 607th jhpaques 🇫🇷 560 238 10ms 30 Nov 2022 608th fgrosshans 🇫🇷 558 239 10ms 14 Nov 2022 608th Terobero 558 239 9ms 3 Sep 2024 608th wh3n3v3r 🇨🇿 558 239 15ms 18 Nov 2024 611th jared-hughes 558 518 1,676ms 16 Sep 2025 612th karhuthebear 556 240 10ms 11 May 2022 613th albanian-laundromat 556 438 29ms 13 Nov 2025 614th adamnielson42 🇺🇸 554 334 12ms 6 Dec 2023 615th Mabeloid 🇳🇴 552 272 2ms 21 Oct 2025 616th tomh1012 552 277 346ms 4 May 2022 617th adamnielson42 🇺🇸 551 242 9ms 25 Apr 2023 617th mrmena 🇦🇺 551 242 10ms 22 Mar 2024 619th GolfingSuccess 🇬🇷 551 472 3,100ms 8 Aug 2022 620th Natanaelel 🇸🇪 550 140 70ms 20 Aug 2022 621st pschmid0 🇺🇸 550 228 5ms 18 Oct 2022 622nd bidger 549 376 512ms 5 Jan 2023 623rd eggled 548 153 3ms 24 Jun 2022 624th MeWhenI 🇻🇦 546 301 74ms 9 May 2023 625th albanian-laundromat 546 638 18ms 18 Sep 2025 626th Mabeloid 🇳🇴 542 246 10ms 1 Sep 2024 626th TheZwierzLF 🇵🇱 542 246 10ms 30 May 2025 628th Macweese 542 277 2ms 3 Aug 2025 629th MeWhenI 🇻🇦 541 280 9ms 12 Apr 2024 630th TylerBloom 541 368 211ms 22 Nov 2024 631st Haksell 🇦🇶 540 174 44ms 22 Feb 2023 632nd CatsAreFluffy 539 188 50ms 25 Jan 2023 633rd TheZwierzLF 🇵🇱 539 222 546ms 7 days ago 634th Wildst 538 248 10ms 7 Jul 2023 635th HumanoidCPU 537 223 545ms 18 Feb 2025 636th yuchuehw 536 249 10ms 1 Feb 2024 637th MeWhenI 🇻🇦 535 228 751ms 15 Sep 2025 638th Jacob385 532 388 368ms 23 Oct 2024 639th FlorianCassayre 🇫🇷 529 252 13ms 29 Jan 2023 640th krcs 🇵🇱 528 199 323ms 3 May 2022 First Prev 561–640 of 822 Next Last