The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Rijndael S-box in C# 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 1st AdrienHache 🇫🇷 1,000 145 410ms 20 Jul 2025 2nd JayXon 🇺🇸 986 147 380ms 12 Jul 2025 3rd bitsandbeyond 🇳🇱 918 158 373ms 2 hours ago 4th error256 901 161 414ms 22 Nov 2024 5th SirBogman 🇺🇸 806 180 384ms 27 Sep 2023 6th weliveinhell 🇭🇹 788 184 334ms 27 Sep 2023 7th stefangimmillaro 775 187 393ms 20 Jun 2025 8th sean-niemann 🇺🇸 744 195 393ms 20 Jun 2025 9th namelessiw 707 205 386ms 21 Jul 2025 10th pardouin 🇫🇷 690 210 416ms 25 Oct 2024 11th CaedenHarper 🇨🇦 628 231 376ms 19 Oct 2025 12th Yax42 🇫🇷 609 238 404ms 20 Jun 2025 13th arcpolaris 569 255 386ms 9 Nov 2025 14th roavin 564 257 338ms 18 Oct 2023 14th janbehrens 🇩🇪 564 257 344ms 30 Dec 2023 14th rifatx 564 257 354ms 21 Jul 2024 17th emgordon154 525 276 387ms 20 Oct 2024 18th annaproxy 518 280 351ms 24 Sep 2023 19th postie77 509 285 369ms 6 Sep 2023 20th Yewzir 🇧🇪 457 317 368ms 17 Oct 2024 21st madex 🇩🇪 443 327 401ms 3 May 2025 22nd tomh1012 420 345 421ms 10 Nov 2025 23rd tomtheisen 🇺🇸 278 521 357ms 13 Feb 2025 24th blaztoma 🇱🇹 269 540 403ms 6 Sep 2025 25th bac0id 247 587 356ms 9 Jan 2025 26th voytxt 🇨🇿 238 609 369ms 4 Nov 2024 27th msbranicky 235 617 351ms 8 Sep 2023 28th dokutan 232 624 324ms 5 Jun 2024 29th Shanethegamer 🇺🇸 184 786 349ms 1 Sep 2023 29th MeWhenI 🇻🇦 184 786 308ms 1 Sep 2023 29th Maximizer02 184 786 312ms 12 Mar 2024 29th KatieLG 🇬🇧 184 786 321ms 5 May 2024 29th Jacob385 184 786 317ms 18 Mar 2025 29th fuzzylojik-golf 🇺🇸 184 786 374ms 7 Sep 2025 29th Babafaba 184 786 379ms 30 Oct 2025 29th HumanoidCPU 184 786 359ms 9 Nov 2025 37th Adix-null 🇱🇹 184 790 355ms 10 Dec 2024 37th rollershutter 184 790 327ms 29 Jan 2025 37th heanyang1 184 790 355ms 23 May 2025 37th KasperKivimaeki 🇫🇮 184 790 337ms 2 Jul 2025 37th Blockyheadman 184 790 366ms 6 Nov 2025 42nd Zach1031 182 795 371ms 23 Nov 2025 43rd Mabeloid 🇳🇴 181 800 375ms 21 Sep 2024 43rd GolfingSuccess 🇬🇷 181 800 355ms 17 Oct 2024 43rd aksyristos 181 800 333ms 18 Oct 2024 43rd QeepQeep 181 800 369ms 10 Nov 2024 43rd Quirkly-Quasar 181 800 366ms 23 Nov 2024 43rd neel11235813 181 800 338ms 9 Dec 2024 43rd Schmitt-Very-Cool 181 800 350ms 28 May 2025 43rd JOrE-Softwares 181 800 364ms 1 Jun 2025 43rd BREMAUCY 🇫🇷 181 800 350ms 7 Aug 2025 43rd JOrE20 🇺🇸 181 800 354ms 6 Nov 2025 43rd gigaprofisi 🇺🇸 181 800 317ms 13 Nov 2025 54th yhm138 181 802 336ms 17 Feb 2025 55th adamnielson42 🇺🇸 181 803 348ms 3 Dec 2024 56th KatieLG-Transpiler 🇬🇧 180 804 354ms 2 Sep 2023 56th retrohun 180 804 345ms 18 Oct 2024 56th SB-945 180 804 353ms 30 Nov 2024 56th JunkIce 180 804 321ms 23 Jan 2025 56th olleicua 🇺🇸 180 804 323ms 23 Jan 2025 56th zt14427 180 804 339ms 11 Feb 2025 56th Ralac07 🇦🇺 180 804 361ms 18 Apr 2025 63rd AidanWalter 165 878 394ms 2 Jan 2025 64th scpchicken 🇵🇼 146 993 330ms 16 Nov 2024 65th RaBa21 🇭🇺 130 1,119 360ms 24 Nov 2024 65th acotis 130 1,119 325ms 14 Feb 2025 1–66 of 66
