The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Topological Sort 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 240th btjones0 519 134 16ms 8 Sep 2025 242nd AlephSquirrel 516 122 689ms 10 Jul 2025 243rd DanielVenable 515 221 199ms 3 Aug 2025 244th SB-945 511 136 17ms 1 Aug 2025 245th Yax42 🇫🇷 511 161 261ms 6 Sep 2025 246th annaproxy 507 137 18ms 5 Sep 2025 246th FortuiteMan 🇫🇷 507 137 18ms 25 Nov 2025 248th andrewjc2000 496 140 17ms 2 Aug 2025 248th hiichbindermax 496 140 16ms 4 Aug 2025 250th MeWhenI 🇻🇦 492 128 580ms 16 Nov 2025 251st CaedenHarper 🇨🇦 486 143 17ms 3 Oct 2025 252nd targrik 486 206 14ms 18 Aug 2025 253rd HumanoidCPU 479 145 22ms 26 Jul 2025 254th weliveinhell 🇭🇹 478 172 13ms 2 days ago 255th voytxt 🇨🇿 478 519 604ms 25 Jul 2025 256th InigoK 🇺🇸 476 146 16ms 3 Sep 2025 257th albanian-laundromat 469 319 1,151ms 29 Oct 2025 258th Mikey-Beep 🇬🇧 465 264 22ms 12 Aug 2025 259th YAJUE114514 460 151 15ms 1 Aug 2025 259th vgamula 🇺🇦 460 151 17ms 4 Aug 2025 261st Ripick 458 161 855ms 6 Aug 2025 262nd CaedenHarper 🇨🇦 453 139 462ms 3 Oct 2025 263rd HumanoidCPU 446 141 413ms 26 Jul 2025 264th error256 446 189 186ms 7 Aug 2025 265th dokutan 443 157 14ms 28 Aug 2025 266th alemelis 440 158 16ms 2 Aug 2025 266th dirckvdende 440 158 17ms 4 Aug 2025 266th cros107 🇦🇺 440 158 17ms 12 Aug 2025 269th MeWhenI 🇻🇦 439 92 47ms 26 days ago 270th h3ra993huskp 🇯🇵 439 341 819ms 25 days ago 271st iczelia 🇩🇪 433 263 220ms 19 Oct 2025 272nd retrohun 430 94 1,096ms 1 Aug 2025 273rd jatloe 429 162 15ms 1 Sep 2025 274th LukeBridges 🇬🇧 429 192 12ms 19 Aug 2025 275th MeWhenI 🇻🇦 428 170 1,009ms 15 Sep 2025 276th shelerr 426 163 1,535ms 21 Aug 2025 277th DialFrost 🇸🇬 417 359 472ms 19 Nov 2025 278th madex 🇩🇪 413 427 252ms 2 Aug 2025 279th moustave 411 169 29ms 19 Aug 2025 280th Lv0Sys 🇵🇱 406 171 14ms 34 hours ago 281st helbling 🇨🇭 405 203 13ms 8 Aug 2025 282nd dokutan 401 157 404ms 28 Aug 2025 283rd JOrE20 🇺🇸 401 205 15ms 23 days ago 284th qpwoeirut 397 175 38ms 2 Aug 2025 285th dokutan 392 144 43ms 2 Aug 2025 286th Lv0Sys 🇵🇱 390 145 137ms 13 days ago 287th jacekwladzinski 382 182 25ms 7 Oct 2025 288th luuumine 🇫🇷 380 183 21ms 21 Oct 2025 289th Mikey-Beep 🇬🇧 378 184 26ms 6 Aug 2025 290th alemelis 378 195 1,095ms 5 Aug 2025 291st emgordon154 372 152 44ms 18 Nov 2025 292nd Artemis21 🇬🇧 372 187 72ms 18 days ago 293rd robin-scragg 368 189 22ms 13 Nov 2025 294th CaedenHarper 🇨🇦 358 203 1,156ms 27 Sep 2025 295th OllieBoyne 🇬🇧 348 200 15ms 14 days ago 296th MeWhenI 🇻🇦 343 193 946ms 25 Nov 2025 297th gigaprofisi 🇺🇸 343 240 12ms 6 Aug 2025 298th guilhem-roy 🇫🇷 342 203 18ms 22 Nov 2025 299th Bulmenisaurus 334 208 126ms 26 Oct 2025 300th madeforlosers 332 248 12ms 25 Aug 2025 301st RobertBurs 328 212 19ms 24 Sep 2025 301st klixel 🇨🇦 328 212 103ms 25 Oct 2025 303rd tomh1012 319 366 432ms 11 Aug 2025 304th CatsAreFluffy 317 219 21ms 30 Oct 2025 305th Jacob385 300 500 661ms 1 Sep 2025 306th KatieLG 🇬🇧 299 586 153ms 2 Aug 2025 307th FlorianCassayre 🇫🇷 293 237 15ms 5 Aug 2025 307th mbittner20 293 237 15ms 18 Aug 2025 309th scpchicken 🇵🇼 286 243 18ms 14 Aug 2025 310th CaedenHarper 🇨🇦 286 288 14ms 29 Aug 2025 311th DialFrost 🇸🇬 280 248 15ms 10 Jul 2025 312th Shotokhan 278 250 18ms 24 Sep 2025 313th H3XDaemon 277 251 15ms 19 Aug 2025 314th Babafaba 272 256 21ms 3 Nov 2025 315th DialFrost 🇸🇬 266 240 416ms 4 days ago 316th Upload-and-View 🇺🇦 263 264 19ms 16 Aug 2025 317th jameswmccarty 260 267 19ms 10 Aug 2025 318th madex 🇩🇪 256 272 15ms 2 Aug 2025 319th Babafaba 255 247 839ms 29 Oct 2025 320th CaedenHarper 🇨🇦 255 587 666ms 6 Oct 2025 First Prev 241–320 of 344 Next Last