The Calendar hole will go live in approximately 83 mins. 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 ArkScript 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 ArkScript 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 641st msbranicky 262 638 133ms 1 Sep 2023 642nd c0d3-4-F00d 🇩🇪 261 241 2ms 4 Dec 2023 643rd helbling 🇨🇭 260 242 2ms 25 Jul 2024 644th Shanethegamer 🇺🇸 259 781 22ms 1 Sep 2023 644th KatieLG 🇬🇧 259 781 21ms 2 Sep 2023 644th KatieLG-Transpiler 🇬🇧 259 781 22ms 2 Sep 2023 644th snoozingnewt 🇨🇦 259 781 23ms 5 Sep 2023 644th vgamula 🇺🇦 259 781 21ms 6 Sep 2023 644th HumanoidCPU 259 781 21ms 16 Apr 2024 644th Mabeloid 🇳🇴 259 781 22ms 21 Sep 2024 644th dokutan 259 781 22ms 18 Oct 2024 644th CaedenHarper 🇨🇦 259 781 22ms 22 Jan 2025 653rd ndren 259 782 24ms 20 Jan 2025 654th Martymoose98 258 244 1ms 30 May 2025 655th JunkIce 258 338 9ms 13 Feb 2025 656th dokutan 257 652 121ms 2 days ago 657th blaztoma 🇱🇹 255 540 372ms 6 Sep 2025 658th 1231234md5 🇨🇳 254 344 17ms 12 Dec 2023 659th Shanethegamer 🇺🇸 253 782 66ms 1 Sep 2023 659th HumanoidCPU 253 782 68ms 27 May 2024 659th dokutan 253 782 66ms 30 Jul 2024 659th Mabeloid 🇳🇴 253 782 66ms 21 Sep 2024 659th CaedenHarper 🇨🇦 253 782 66ms 22 Jan 2025 664th rak1507 🇬🇧 252 347 49ms 1 Sep 2023 665th dokutan 251 588 427ms 24 Sep 2025 666th KatieLG 🇬🇧 251 712 3ms 22 Aug 2024 667th KatieLG 🇬🇧 250 792 67ms 2 Sep 2023 668th gigaprofisi 🇺🇸 248 254 2ms 16 Jul 2025 669th KatieLG 🇬🇧 246 430 10ms 5 Oct 2025 670th kallmi28 🇨🇿 244 258 2ms 8 Nov 2023 671st dokutan 244 791 122ms 18 Oct 2024 672nd KatieLG-Transpiler 🇬🇧 244 809 615ms 2 Sep 2023 673rd HumanoidCPU 243 425 620ms 4 days ago 674th MeWhenI 🇻🇦 243 779 8ms 1 Sep 2023 674th Shanethegamer 🇺🇸 243 779 8ms 1 Sep 2023 674th HumanoidCPU 243 779 8ms 16 Apr 2024 674th Mabeloid 🇳🇴 243 779 8ms 21 Sep 2024 674th dokutan 243 779 8ms 18 Oct 2024 674th CaedenHarper 🇨🇦 243 779 8ms 22 Jan 2025 680th Shanethegamer 🇺🇸 243 795 109ms 1 Sep 2023 680th KatieLG 🇬🇧 243 795 114ms 2 Sep 2023 680th KatieLG-Transpiler 🇬🇧 243 795 109ms 2 Sep 2023 680th msbranicky 243 795 111ms 11 Sep 2023 680th HumanoidCPU 243 795 104ms 16 Apr 2024 680th Mabeloid 🇳🇴 243 795 123ms 21 Sep 2024 680th CaedenHarper 🇨🇦 243 795 109ms 21 Jan 2025 687th yzhs 🇩🇪 242 260 1ms 24 Mar 2024 688th msbranicky 242 596 1ms 10 Oct 2023 689th msbranicky 242 637 6ms 1 Sep 2023 690th snoozingnewt 🇨🇦 242 798 105ms 4 Sep 2023 691st LostSyntax21 🇬🇧 241 363 33ms 23 Oct 2025 692nd MeWhenI 🇻🇦 241 800 109ms 1 Sep 2023 693rd msbranicky 238 625 82ms 1 Sep 2023 694th KatieLG 🇬🇧 237 797 8ms 2 Sep 2023 694th KatieLG-Transpiler 🇬🇧 237 797 8ms 2 Sep 2023 696th roguh 🇬🇹 235 268 2ms 23 Jan 2024 697th bac0id 235 587 356ms 9 Jan 2025 698th cbrt-x 235 821 109ms 9 Oct 2023 699th msbranicky 234 678 1,676ms 17 Sep 2025 700th annaproxy 233 270 2ms 1 Sep 2023 701st Maximizer02 231 578 6ms 22 Mar 2024 702nd msbranicky 231 635 279ms 1 Sep 2023 703rd AbhilashaTandon 230 380 17ms 21 Sep 2023 704th Shanethegamer 🇺🇸 229 448 390ms 1 Sep 2023 705th Shanethegamer 🇺🇸 228 783 2ms 1 Sep 2023 705th theunofficialcoder 228 783 2ms 21 Jan 2024 705th Mabeloid 🇳🇴 228 783 3ms 21 Sep 2024 705th CaedenHarper 🇨🇦 228 783 2ms 22 Jan 2025 709th dokutan 227 569 2ms 6 Jun 2024 710th KatieLG-Transpiler 🇬🇧 227 787 2ms 2 Sep 2023 711th dokutan 226 324 3ms 13 Nov 2024 712th TheZwierzLF 🇵🇱 226 373 2,526ms 24 days ago 713th alphafalfa 226 572 14ms 1 Aug 2025 714th voytxt 🇨🇿 226 609 369ms 4 Nov 2024 715th msbranicky 223 594 83ms 1 Sep 2023 716th msbranicky 223 617 351ms 8 Sep 2023 717th eiburns 221 285 2ms 6 Nov 2023 718th dokutan 221 427 107ms 2 Apr 2024 719th dokutan 221 624 324ms 5 Jun 2024 720th KatieLG-Transpiler 🇬🇧 221 802 2ms 2 Sep 2023 First Prev 641–720 of 1,348 Next Last