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 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 321st SirBogman 🇺🇸 593 204 1,324ms 21 Sep 2023 322nd dokutan 593 558 3ms 25 Oct 2023 323rd commandblockguy 🇺🇸 592 212 548ms 1 Sep 2025 324th CaedenHarper 🇨🇦 591 231 376ms 19 Oct 2025 325th emgordon154 590 283 5ms 10 Jan 2025 326th annaproxy 590 318 15ms 1 Sep 2023 327th MeWhenI 🇻🇦 589 213 145ms 3 Aug 2024 328th duckyluuk 🇳🇱 588 208 2,775ms 30 Jul 2025 329th inventshah 588 249 396ms 3 Sep 2023 330th albanian-laundromat 586 214 780ms 4 Aug 2025 331st weliveinhell 🇭🇹 582 210 10ms 13 Oct 2023 331st andrewjc2000 582 210 96ms 14 Aug 2025 333rd dokutan 581 216 717ms 9 Sep 2025 334th MeWhenI 🇻🇦 580 246 6ms 11 Oct 2023 335th JOrE20 🇺🇸 580 736 7ms 20 days ago 336th duckyluuk 🇳🇱 579 570 6ms 13 Jun 2025 337th helbling 🇨🇭 578 228 9ms 25 Jul 2024 338th anter69 🇭🇺 577 146 920ms 12 days ago 339th MeWhenI 🇻🇦 577 775 1ms 1 Sep 2023 339th Shanethegamer 🇺🇸 577 775 1ms 1 Sep 2023 339th snoozingnewt 🇨🇦 577 775 1ms 5 Sep 2023 339th DialFrost 🇸🇬 577 775 1ms 7 Sep 2023 339th dokutan 577 775 1ms 10 Sep 2023 339th HumanoidCPU 577 775 1ms 16 Apr 2024 339th weliveinhell 🇭🇹 577 775 1ms 7 Jun 2024 339th Mabeloid 🇳🇴 577 775 1ms 21 Sep 2024 339th CaedenHarper 🇨🇦 577 775 1ms 22 Jan 2025 339th fuzzylojik-golf 🇺🇸 577 775 2ms 8 Jul 2025 339th JOrE20 🇺🇸 577 775 1ms 10 Nov 2025 350th KatieLG-Transpiler 🇬🇧 576 776 1ms 2 Sep 2023 351st Yax42 🇫🇷 574 238 404ms 20 Jun 2025 352nd Yewzir 🇧🇪 572 577 6ms 18 Dec 2024 353rd albanian-laundromat 571 214 153ms 6 May 2025 354th janbehrens 🇩🇪 571 232 4ms 30 Dec 2023 355th StefanHabel 🇨🇦 568 215 117ms 1 Sep 2023 356th emgordon154 565 189 36ms 6 Mar 2025 357th KatieLG 🇬🇧 565 222 592ms 17 Aug 2024 357th emgordon154 565 222 145ms 20 Nov 2024 359th janbehrens 🇩🇪 563 217 11ms 2 Jan 2024 359th BREMAUCY 🇫🇷 563 217 112ms 24 Aug 2025 361st jmerle 🇳🇱 561 760 7ms 1 Sep 2023 362nd DialFrost 🇸🇬 558 219 111ms 11 Oct 2024 363rd snoozingnewt 🇨🇦 557 280 4,978ms 3 Nov 2025 364th annaproxy 556 220 116ms 4 Oct 2023 364th dokutan 556 220 10ms 9 Sep 2025 366th gigaprofisi 🇺🇸 556 237 11ms 16 Jul 2025 367th dokutan 556 767 7ms 12 Jan 2024 367th error256 556 767 7ms 7 Jul 2024 367th KatieLG 🇬🇧 556 767 7ms 31 Jul 2024 367th Shanethegamer 🇺🇸 556 767 9ms 11 May 2025 367th snoozingnewt 🇨🇦 556 767 7ms 3 Oct 2025 372nd stefangimmillaro 554 212 131ms 24 Oct 2023 373rd OllieBoyne 🇬🇧 553 221 10ms 6 Jun 2024 374th TheZwierzLF 🇵🇱 550 228 802ms 11 days ago 375th ndren 549 777 9ms 1 Sep 2023 376th commandblockguy 🇺🇸 548 223 39ms 23 Mar 2025 377th KatieLG 🇬🇧 546 224 113ms 26 Feb 2024 378th MeWhenI 🇻🇦 545 782 7ms 1 Sep 2023 378th msbranicky 545 782 7ms 15 Sep 2023 378th KatieLG-Transpiler 🇬🇧 545 782 7ms 18 Nov 2023 378th HumanoidCPU 545 782 7ms 28 May 2024 378th Mabeloid 🇳🇴 545 782 7ms 21 Sep 2024 378th CaedenHarper 🇨🇦 545 782 7ms 22 Jan 2025 384th tobeannouncd 543 352 135ms 20 Dec 2024 385th MeWhenI 🇻🇦 540 296 1,750ms 7 Nov 2025 386th mathisfun271 538 227 10ms 16 Feb 2024 387th scpchicken 🇵🇼 536 228 119ms 2 Nov 2023 388th arcpolaris 536 255 386ms 9 Nov 2025 389th cros107 🇦🇺 534 229 9ms 11 Nov 2025 390th snoozingnewt 🇨🇦 534 247 9ms 4 Nov 2025 391st Languag3 531 230 11ms 15 Oct 2024 391st wh3n3v3r 🇨🇿 531 230 107ms 18 Nov 2024 393rd roavin 531 257 338ms 18 Oct 2023 393rd janbehrens 🇩🇪 531 257 344ms 30 Dec 2023 393rd rifatx 531 257 354ms 21 Jul 2024 396th h3ra993huskp 🇯🇵 531 276 648ms 18 days ago 397th Mabeloid 🇳🇴 527 238 804ms 17 Sep 2024 398th stefangimmillaro 523 161 1,088ms 13 Nov 2023 399th didion0 🇺🇸 523 252 9ms 24 Feb 2025 400th edsrzf 🇳🇿 523 367 13ms 22 Oct 2024 First Prev 321–400 of 1,367 Next Last