The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Rijndael S-box in all languages in chars. 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 Chars Time Submitted 241st AlephSquirrel 649 138 563ms 4 Feb 2024 242nd sisyphus-ppcg 🇦🇺 648 163 9ms 1 Sep 2023 242nd Steffan153 🇫🇮 648 163 8ms 19 Oct 2023 242nd snoozingnewt 🇨🇦 648 163 8ms 4 Nov 2025 245th dokutan 647 135 11ms 10 Sep 2025 246th GrayJoKing 🇦🇺 642 127 40ms 18 Nov 2023 247th SirBogman 🇺🇸 640 231 405ms 27 Sep 2023 248th SirBogman 🇺🇸 638 132 63ms 5 Mar 2024 249th KatieLG 🇬🇧 638 137 117ms 29 Jul 2024 249th ovs-code 🇩🇪 638 137 34ms 17 Mar 2025 251st emgordon154 638 151 121ms 18 Oct 2024 252nd dvargas46 🇺🇸 636 164 7ms 7 Sep 2023 253rd weliveinhell 🇭🇹 630 284 2ms 15 Jan 2024 254th blaztoma 🇱🇹 629 118 269ms 19 Oct 2025 255th CaedenHarper 🇨🇦 629 235 456ms 10 Oct 2025 256th AlephSquirrel 628 139 30ms 4 Feb 2024 257th error256 628 163 367ms 8 Sep 2024 258th xnor-gate 624 140 363ms 9 Sep 2023 258th wh3n3v3r 🇨🇿 624 140 111ms 18 Nov 2024 260th DialFrost 🇸🇬 624 237 368ms 24 Sep 2025 261st emplv 🇱🇻 621 155 137ms 19 Oct 2025 262nd lifthrasiir 🇰🇷 621 170 10ms 23 Nov 2024 263rd edsrzf 🇳🇿 619 141 9ms 14 days ago 264th Natanaelel 🇸🇪 618 132 58ms 10 Sep 2023 265th emgordon154 618 366 100ms 14 days ago 266th acotis 617 170 139ms 29 May 2025 267th stefangimmillaro 616 222 41ms 26 Apr 2025 268th nwellnhof 🇩🇪 615 142 36ms 15 Nov 2023 268th bizy-coder 615 142 16ms 29 Oct 2024 270th Babafaba 613 146 376ms 30 Oct 2025 271st CaedenHarper 🇨🇦 613 239 275ms 4 Nov 2025 272nd dokutan 612 682 400ms 11 days ago 273rd ovs-code 🇩🇪 610 168 284ms 12 May 2024 274th iczelia 🇩🇪 608 122 341ms 8 Nov 2025 275th weliveinhell 🇭🇹 607 141 1,099ms 6 Jun 2024 276th luuumine 🇫🇷 607 144 17ms 21 Nov 2025 277th GolfingSuccess 🇬🇷 604 338 4ms 19 Aug 2024 278th MeWhenI 🇻🇦 603 142 1,056ms 1 Sep 2023 279th lyphyser 603 174 133ms 8 Sep 2023 280th canissimia 🇦🇶 602 145 88ms 9 Sep 2023 280th SB-945 602 145 51ms 12 Sep 2025 282nd SirBogman 🇺🇸 601 149 523ms 20 Jan 2024 283rd SirBogman 🇺🇸 601 204 1,324ms 21 Sep 2023 284th emgordon154 600 105 2ms 27 Sep 2025 285th Babafaba 598 146 26ms 30 Oct 2025 286th GrayJoKing 🇦🇺 597 150 771ms 16 Jan 2024 287th CaedenHarper 🇨🇦 596 231 376ms 19 Oct 2025 288th emgordon154 596 283 5ms 10 Jan 2025 289th annaproxy 595 318 15ms 1 Sep 2023 290th inventshah 594 249 396ms 3 Sep 2023 291st dcgjb 590 141 355ms 5 Jun 2024 292nd juliusgeo 590 148 21ms 17 Sep 2023 292nd 5cw 🇺🇸 590 148 443ms 17 Jul 2025 294th MeWhenI 🇻🇦 587 246 6ms 11 Oct 2023 295th emgordon154 587 348 4ms 30 Aug 2024 296th anter69 🇭🇺 586 146 920ms 17 days ago 297th vhoulbreque 🇫🇷 582 150 29ms 20 days ago 298th duckyluuk 🇳🇱 582 570 6ms 13 Jun 2025 299th JOrE20 🇺🇸 582 736 7ms 26 days ago 300th AdrienHache 🇫🇷 581 143 224ms 2 Jan 2024 301st MeWhenI 🇻🇦 581 154 449ms 17 Jan 2024 302nd anter69 🇭🇺 579 141 33ms 17 days ago 303rd GrayJoKing 🇦🇺 578 151 25ms 15 Nov 2023 303rd yzhs 🇩🇪 578 151 17ms 24 Mar 2024 305th janbehrens 🇩🇪 578 232 6ms 30 Dec 2023 306th Yax42 🇫🇷 578 238 404ms 20 Jun 2025 307th FlorianCassayre 🇫🇷 575 152 11ms 18 Sep 2023 307th Seek64 🇩🇪 575 152 22ms 5 Jun 2024 309th Yewzir 🇧🇪 575 577 6ms 18 Dec 2024 310th jared-hughes 571 185 9ms 7 Sep 2023 310th stefangimmillaro 571 185 12ms 30 Sep 2024 312th MeWhenI 🇻🇦 567 154 40ms 1 Sep 2023 313th Argeento 🇵🇱 565 187 9ms 4 Oct 2023 314th sisyphus-ppcg 🇦🇺 564 155 12ms 7 days ago 315th snoozingnewt 🇨🇦 563 280 4,978ms 3 Nov 2025 316th jmerle 🇳🇱 563 760 7ms 1 Sep 2023 317th dokutan 558 767 7ms 12 Jan 2024 317th error256 558 767 7ms 7 Jul 2024 317th KatieLG 🇬🇧 558 767 7ms 31 Jul 2024 317th Shanethegamer 🇺🇸 558 767 9ms 11 May 2025 First Prev 241–320 of 1,346 Next Last