The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
ROT13 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 801st madeforlosers 504 173 10ms 14 Jan 2025 802nd Shanethegamer 🇺🇸 503 141 51ms 2 Jan 2025 803rd alaaeelsayed 503 167 379ms 15 Jan 2025 804th balloffur 501 167 472ms 10 days ago 805th aditsu 499 109 4,042ms 17 days ago 806th jtaxen 497 131 45ms 27 Jan 2025 807th Kacarott 🇦🇺 497 193 7ms 26 Apr 2025 808th jameswmccarty 493 132 11ms 7 Mar 2025 809th HumanoidCPU 490 171 63ms 17 Jan 2025 810th DanielSchmerber 488 172 395ms 9 Jan 2025 811th snoozingnewt 🇨🇦 487 177 8ms 2 Nov 2025 812th nils-imhoff 487 253 1,647ms 27 Jun 2025 813th JRaspass 🇬🇧 486 224 264ms 5 Jan 2025 814th HumanoidCPU 483 138 2ms 25 May 2025 815th Ailko 🇧🇪 482 135 29ms 17 Jan 2025 815th itljan30 482 135 11ms 26 Jan 2025 815th smilesformiles3 482 135 20ms 18 Jun 2025 818th gjoacorp 🇬🇧 481 174 438ms 4 Aug 2025 818th dokutan 481 174 83ms 13 Nov 2025 820th snoozingnewt 🇨🇦 480 192 9ms 2 Nov 2025 821st dokutan 479 139 5ms 13 Nov 2025 822nd emgordon154 472 141 5ms 5 Jan 2025 822nd snoozingnewt 🇨🇦 472 141 4ms 2 Nov 2025 824th snoozingnewt 🇨🇦 472 253 40ms 2 Nov 2025 825th snoozingnewt 🇨🇦 471 196 32ms 2 Nov 2025 826th Pale-Vessel 471 216 190ms 23 Sep 2025 827th JunkIce 470 117 832ms 17 Jan 2025 828th HumanoidCPU 470 179 347ms 2 Feb 2025 829th snooze92 🇫🇷 469 139 11ms 5 Mar 2025 830th balloffur 466 143 5ms 10 days ago 831st brimstonetrader 465 140 18ms 6 Jan 2025 832nd snoozingnewt 🇨🇦 465 188 27ms 2 Nov 2025 833rd PyryL 🇫🇮 462 141 11ms 22 Jan 2025 834th madex 🇩🇪 459 142 18ms 4 Jan 2025 835th snoozingnewt 🇨🇦 459 155 154ms 2 Nov 2025 836th yoshykai 459 183 415ms 10 Apr 2025 837th HumanoidCPU 458 155 384ms 1 Feb 2025 837th dokutan 458 155 343ms 30 Mar 2025 839th HumanoidCPU 458 220 30ms 6 Nov 2025 840th snoozingnewt 🇨🇦 456 158 106ms 2 Nov 2025 841st galloj 🇨🇿 455 143 15ms 23 Jan 2025 842nd snoozingnewt 🇨🇦 453 111 851ms 2 Nov 2025 843rd CheeseCake628 🇳🇴 452 144 11ms 19 May 2025 844th mhgockel 450 148 4ms 21 Jun 2025 845th TaserTheFox 🇺🇸 449 145 12ms 22 Feb 2025 846th snoozingnewt 🇨🇦 448 187 1,285ms 2 Nov 2025 847th nullshallot 444 111 308ms 5 Jan 2025 848th emgordon154 444 124 10ms 30 Jun 2025 849th martinorav 440 148 13ms 20 Jan 2025 849th qwjhvbxi 440 148 19ms 21 Jan 2025 851st blaztoma 🇱🇹 439 107 330ms 29 Oct 2025 852nd Chinay-Domitrix 🇺🇸 435 125 4,172ms 16 Apr 2025 853rd iczelia 🇩🇪 435 163 5ms 21 Sep 2025 854th ComputerKWasTaken 🇺🇸 434 150 10ms 20 Jan 2025 855th JOrE20 🇺🇸 430 234 26ms 13 days ago 856th atazzam 🇺🇸 428 152 11ms 16 Jan 2025 857th Andrey2001 426 153 12ms 23 days ago 858th osNiko 🇧🇷 418 86 55ms 16 Aug 2025 859th Zhenyu-Bo 412 158 10ms 1 Aug 2025 860th MeWhenI 🇻🇦 409 103 868ms 15 Sep 2025 861st snoozingnewt 🇨🇦 409 241 43ms 2 Nov 2025 862nd CheeseCake628 🇳🇴 408 135 409ms 18 Oct 2025 863rd CaedenHarper 🇨🇦 408 235 6ms 14 Nov 2025 864th snoozingnewt 🇨🇦 408 247 26ms 2 Nov 2025 865th vyx777 407 214 10ms 11 Jan 2025 865th non-bin 407 214 10ms 28 Jun 2025 867th snoozingnewt 🇨🇦 405 247 5ms 2 Nov 2025 868th mbittner20 404 161 12ms 7 Feb 2025 869th HumanoidCPU 403 125 834ms 6 Nov 2025 870th KatieLG 🇬🇧 402 85 23ms 6 Jan 2025 871st KatieLG 🇬🇧 402 270 32ms 5 Jan 2025 872nd dokutan 397 157 120ms 13 Nov 2025 873rd KatieLG 🇬🇧 389 183 144ms 26 days ago 874th KatieLG 🇬🇧 389 216 2ms 2 Oct 2025 875th WillowWispy 388 168 11ms 22 Mar 2025 876th chartung17 385 169 19ms 7 Apr 2025 877th gnuvince 384 55 2ms 29 Jun 2025 878th Andrey2001 380 145 446ms 21 days ago 879th robin-scragg 379 172 15ms 7 Jul 2025 880th The-Wolfson 376 242 98ms 22 Jan 2025 First Prev 801–880 of 970 Next Last