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 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 481st error256 469 542 2ms 31 May 2024 481st fuzzylojik-golf 🇺🇸 469 542 2ms 8 Jul 2025 483rd KatieLG-Transpiler 🇬🇧 469 838 10ms 2 Sep 2023 484th weliveinhell 🇭🇹 468 543 3ms 6 Jan 2024 485th emgordon154 466 156 60ms 21 Nov 2025 486th Flekay 🇩🇪 465 263 10ms 11 Jul 2025 487th jtaxen 461 265 39ms 14 May 2024 488th YAJUE114514 459 266 362ms 9 days ago 489th emgordon154 459 494 100ms 15 days ago 490th weliveinhell 🇭🇹 456 202 63ms 6 Jan 2024 491st yuchuehw 454 269 10ms 26 Jan 2024 491st inverseLorentz 🇦🇺 454 269 15ms 20 Feb 2024 493rd Natanaelel 🇸🇪 450 162 35ms 28 Nov 2023 494th alemelis 448 273 576ms 9 Sep 2024 494th hiichbindermax 448 273 9ms 13 Feb 2025 496th una-ada 🇺🇸 448 294 9ms 5 Sep 2023 497th GolfingSuccess 🇬🇷 447 167 2ms 1 Sep 2023 498th aaronze 🇦🇺 445 240 45ms 22 Sep 2023 499th IISResetMe 442 250 396ms 24 Nov 2025 500th AdrienHache 🇫🇷 439 520 77ms 22 Feb 2024 501st GolfingSuccess 🇬🇷 434 466 4ms 19 Aug 2024 502nd Yewzir 🇧🇪 431 317 368ms 17 Oct 2024 503rd blaztoma 🇱🇹 430 121 51ms 19 Oct 2025 504th HumanoidCPU 427 773 3ms 12 Dec 2024 504th dokutan 427 773 3ms 12 Dec 2024 504th KatieLG 🇬🇧 427 773 3ms 3 Jan 2025 504th Shanethegamer 🇺🇸 427 773 3ms 11 Jan 2025 504th BREMAUCY 🇫🇷 427 773 3ms 14 Jan 2025 504th CaedenHarper 🇨🇦 427 773 3ms 22 Jan 2025 504th JOrE20 🇺🇸 427 773 3ms 23 days ago 511th emgordon154 425 476 4ms 30 Aug 2024 512th ZakkkkAttackkkk 🇵🇭 422 177 2ms 24 Feb 2025 513th snyderek 🇺🇸 421 228 79ms 4 Feb 2025 514th msbranicky 421 932 11ms 19 Sep 2023 515th bobbysq 420 291 10ms 20 May 2024 516th Yewzir 🇧🇪 419 459 6ms 4 Apr 2024 517th madex 🇩🇪 418 327 401ms 3 May 2025 518th brimstonetrader 416 294 97ms 10 Jan 2024 519th KatieLG-Transpiler 🇬🇧 413 802 2ms 2 Sep 2023 520th Natanaelel 🇸🇪 411 465 153ms 9 Jun 2025 521st typeswitch-dev 🇵🇹 410 571 4ms 1 Sep 2023 522nd ndren 409 127 54ms 17 Jun 2024 523rd jerrandolph 408 356 263ms 22 Sep 2025 524th Yewzir 🇧🇪 407 236 530ms 27 Jan 2024 525th jacobly0 🇺🇸 400 187 3ms 1 Sep 2023 526th janbehrens 🇩🇪 399 241 70ms 30 Dec 2023 527th tomh1012 396 345 421ms 10 Nov 2025 528th error256 396 544 16ms 31 May 2024 528th dokutan 396 544 15ms 8 Apr 2025 530th dokutan 396 577 64ms 11 days ago 531st hellwue 393 311 17ms 10 Sep 2024 532nd weliveinhell 🇭🇹 391 550 15ms 6 Jan 2024 533rd msbranicky 389 848 6ms 13 Jan 2025 534th MeWhenI 🇻🇦 388 561 2ms 1 Sep 2023 535th madex 🇩🇪 386 218 1,034ms 3 Jul 2024 536th jared-hughes 385 194 2ms 7 Sep 2023 537th dokutan 384 591 96ms 11 days ago 538th bac0id 381 252 2,955ms 8 Jan 2025 539th aksyristos 381 321 13ms 11 Sep 2023 540th nyoshe 379 197 2ms 19 Sep 2023 541st msbranicky 368 591 2ms 1 Sep 2023 542nd msbranicky 366 625 82ms 1 Sep 2023 543rd MeWhenI 🇻🇦 362 559 3ms 16 Aug 2024 544th elgan65536 361 207 2ms 7 Apr 2024 544th madex 🇩🇪 361 207 2ms 3 Jul 2024 544th luuumine 🇫🇷 361 207 2ms 27 days ago 547th emplv 🇱🇻 356 259 57ms 20 Oct 2023 548th dokutan 356 568 4ms 12 Aug 2024 549th RaBa21 🇭🇺 355 344 20ms 1 Aug 2025 550th Natanaelel 🇸🇪 352 212 1ms 4 Sep 2023 550th iczelia 🇩🇪 352 212 1ms 17 Oct 2025 552nd rak1507 🇬🇧 352 347 49ms 1 Sep 2023 553rd Ripick 351 343 285ms 14 Jul 2024 554th MichalMarsalek 🇨🇿 351 1,448 5ms 1 Sep 2023 555th CaedenHarper 🇨🇦 348 215 3ms 30 Jan 2025 556th MeWhenI 🇻🇦 347 578 29ms 6 Sep 2023 557th logvp 343 218 1ms 1 Feb 2024 558th MeWhenI 🇻🇦 343 492 41ms 30 Aug 2024 559th Yewzir 🇧🇪 341 219 2ms 7 Nov 2023 560th dokutan 338 568 6ms 5 Jun 2024 First Prev 481–560 of 1,373 Next Last