The Calendar hole will go live in approximately 13 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 481st voytxt 🇨🇿 394 268 11ms 1 Sep 2023 482nd madex 🇩🇪 393 218 1,034ms 3 Jul 2024 483rd TheZwierzLF 🇵🇱 393 228 802ms 11 days ago 484th madex 🇩🇪 392 208 51ms 3 Jul 2024 485th commandblockguy 🇺🇸 392 223 39ms 23 Mar 2025 486th MeWhenI 🇻🇦 392 365 41ms 30 Aug 2024 487th madex 🇩🇪 391 270 9ms 1 Jul 2024 488th msbranicky 391 848 6ms 13 Jan 2025 489th mathisfun271 385 227 10ms 16 Feb 2024 490th rgthree 385 274 11ms 6 Sep 2023 490th ArmaanAS 385 274 11ms 23 Feb 2025 492nd scpchicken 🇵🇼 383 228 119ms 2 Nov 2023 493rd dokutan 383 591 96ms 5 days ago 494th cros107 🇦🇺 381 229 9ms 11 Nov 2025 495th Languag3 380 230 11ms 15 Oct 2024 496th AdrienHache 🇫🇷 379 392 77ms 22 Feb 2024 497th fgrosshans 🇫🇷 378 231 23ms 1 Sep 2023 498th alemelis 378 271 576ms 8 Sep 2024 499th GolfingSuccess 🇬🇷 377 167 2ms 1 Sep 2023 500th targrik 375 282 13ms 7 Feb 2025 501st snyderek 🇺🇸 369 228 79ms 4 Feb 2025 502nd ahmetdemirag 🇨🇾 369 237 106ms 19 Feb 2025 503rd qpwoeirut 365 239 44ms 19 Sep 2025 504th MeWhenI 🇻🇦 365 559 3ms 16 Aug 2024 505th m42km 364 240 54ms 4 Feb 2024 506th edsrzf 🇳🇿 364 367 13ms 22 Oct 2024 507th Natanaelel 🇸🇪 362 195 244ms 22 Apr 2025 508th adamnielson42 🇺🇸 361 242 10ms 20 Dec 2023 508th madex 🇩🇪 361 242 10ms 2 Jul 2024 510th una-ada 🇺🇸 359 294 9ms 5 Sep 2023 511th TheZwierzLF 🇵🇱 358 244 10ms 11 days ago 512th Yewzir 🇧🇪 357 236 530ms 27 Jan 2024 513th ZakkkkAttackkkk 🇵🇭 356 177 2ms 24 Feb 2025 514th two-bad 🇬🇧 356 297 11ms 22 Feb 2024 515th nstearns96 🇬🇧 352 248 10ms 20 Sep 2023 516th HumanoidCPU 352 300 12ms 28 May 2024 517th StinkAndShityAura 351 249 10ms 17 Nov 2024 518th janbehrens 🇩🇪 349 241 70ms 30 Dec 2023 519th Ripick 348 343 285ms 14 Jul 2024 520th croc54 344 254 52ms 30 Jan 2025 520th rucin93 🇵🇱 344 254 34ms 31 May 2025 522nd aaronze 🇦🇺 340 240 45ms 22 Sep 2023 523rd jacobly0 🇺🇸 337 187 3ms 1 Sep 2023 524th mbittner20 337 259 10ms 17 Jul 2024 525th KatieLG 🇬🇧 337 526 4ms 7 Jun 2025 526th stertooy 🇧🇪 336 260 52ms 16 Jun 2024 527th bac0id 334 252 2,955ms 8 Jan 2025 528th IISResetMe 332 250 396ms 23 days ago 529th Flekay 🇩🇪 332 263 10ms 11 Jul 2025 530th jtaxen 330 265 39ms 14 May 2024 531st YAJUE114514 328 266 362ms 4 days ago 532nd frankgraziano 328 318 4,993ms 11 Apr 2025 533rd dokutan 327 405 77ms 19 Oct 2024 534th jared-hughes 325 194 2ms 7 Sep 2023 535th yuchuehw 325 269 10ms 26 Jan 2024 535th inverseLorentz 🇦🇺 325 269 15ms 20 Feb 2024 537th msbranicky 325 609 84ms 13 Sep 2023 538th msbranicky 325 623 27ms 21 Sep 2023 539th msbranicky 324 546 3ms 1 Sep 2023 540th scpchicken 🇵🇼 323 326 4ms 1 Nov 2023 541st dokutan 322 328 11ms 13 Mar 2025 542nd nyoshe 320 197 2ms 19 Sep 2023 543rd hiichbindermax 320 273 9ms 13 Feb 2025 544th dokutan 320 328 788ms 5 days ago 545th dokutan 319 528 11ms 9 Apr 2025 546th dokutan 317 451 40ms 4 Oct 2024 547th MeWhenI 🇻🇦 315 424 6ms 9 May 2024 548th HumanoidCPU 314 416 2ms 27 days ago 549th emplv 🇱🇻 313 259 57ms 20 Oct 2023 550th snoozingnewt 🇨🇦 311 419 2ms 23 Sep 2025 551st MeWhenI 🇻🇦 310 773 13ms 1 Sep 2023 551st Shanethegamer 🇺🇸 310 773 13ms 1 Sep 2023 551st snoozingnewt 🇨🇦 310 773 13ms 2 Sep 2023 551st msbranicky 310 773 13ms 13 Sep 2023 551st theunofficialcoder 310 773 13ms 7 Jan 2024 551st KatieLG 🇬🇧 310 773 14ms 17 Mar 2024 551st HumanoidCPU 310 773 13ms 16 Apr 2024 551st Mabeloid 🇳🇴 310 773 13ms 21 Sep 2024 551st CaedenHarper 🇨🇦 310 773 13ms 22 Jan 2025 551st JunkIce 310 773 13ms 24 Jan 2025 First Prev 481–560 of 1,340 Next Last