The Calendar hole will go live in approximately 3 days. Why not try and solve it ahead of time?
Arrows 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 795th Andrey2001 428 223 10ms 25 Nov 2025 802nd msbranicky 427 318 266ms 3 Oct 2023 803rd CatsAreFluffy 426 199 11ms 30 Dec 2022 803rd alexsave 426 199 11ms 16 Oct 2025 805th SteveHales 426 208 127ms 20 Oct 2025 806th BobDotCom 426 224 11ms 25 Mar 2022 806th sleepyStick 426 224 12ms 14 Jul 2022 808th Jacob385 426 264 878ms 28 Oct 2025 809th sergioabreu-g 426 319 305ms 20 Jun 2025 810th 1231234md5 🇨🇳 424 225 11ms 15 Dec 2023 810th billythegoat356 424 225 13ms 5 Jun 2024 812th tamanugi 🇯🇵 424 304 125ms 4 Nov 2022 813th edsrzf 🇳🇿 423 223 5ms 31 Oct 2024 814th CaedenHarper 🇨🇦 422 200 164ms 23 Aug 2025 815th pineapplebox 422 201 11ms 1 Apr 2022 816th trist224 🇫🇷 422 226 13ms 21 Feb 2023 817th TylerBloom 421 323 176ms 21 Mar 2024 818th Mabeloid 🇳🇴 420 199 483ms 18 Sep 2024 819th abc7-12 420 205 2ms 2 Jun 2024 820th mothcolada 🇺🇸 420 227 11ms 8 Oct 2021 820th zt14427 420 227 13ms 28 Sep 2023 820th ballaire 420 227 11ms 27 Jan 2024 820th jatloe 420 227 16ms 23 Oct 2024 824th GeorgeStechman 🇬🇧 418 203 12ms 4 Dec 2023 824th smclaughlin-cf 418 203 11ms 6 May 2025 826th tobyLovick 418 228 13ms 10 Dec 2023 826th mathisfun271 418 228 10ms 6 Mar 2024 826th Mefred 418 228 11ms 29 Oct 2025 829th janAkali 🇷🇺 418 254 455ms 20 May 2024 830th gbxdl 418 325 173ms 19 Jul 2022 831st MeWhenI 🇻🇦 417 148 49ms 15 Dec 2021 832nd MeWhenI 🇻🇦 417 337 6ms 25 Nov 2023 833rd twocatsinatrenchcoat 416 229 14ms 14 Apr 2022 833rd cthierfelder 🇲🇨 416 229 10ms 14 Nov 2025 835th cochrane 416 267 97ms 22 Mar 2024 836th EthanGrant1 415 230 12ms 10 Nov 2022 837th zakariamouhid 414 205 11ms 22 Apr 2023 838th MichaelMBradley 🇨🇦 413 231 17ms 27 Feb 2022 838th Florian-Mt 413 231 11ms 27 Nov 2023 838th l-donovan 413 231 13ms 6 Feb 2024 841st hamhub7 413 232 429ms 9 Aug 2022 842nd Ralac07 🇦🇺 412 206 12ms 24 Nov 2025 843rd Attero 🇸🇪 412 209 2ms 5 Aug 2022 844th jtaxen 411 232 14ms 21 May 2024 844th therealnumbers 411 232 11ms 29 Sep 2025 846th HumanoidCPU 410 207 11ms 23 Nov 2025 846th Protothor 410 207 13ms 22 hours ago 848th msbranicky 410 221 2ms 10 Oct 2023 849th CaedenHarper 🇨🇦 408 225 134ms 25 Aug 2025 850th Mabeloid 🇳🇴 406 209 12ms 13 Oct 2024 851st Stockoh 🇫🇷 406 235 11ms 1 May 2024 852nd Shnapster 406 236 430ms 28 Sep 2023 853rd wiebecommajonas 406 335 162ms 31 Oct 2021 854th ridingqwerty 🇺🇸 404 207 738ms 22 Jan 2024 855th Yewzir 🇧🇪 404 210 11ms 17 Apr 2023 856th celiendonze 🇨🇭 404 236 12ms 21 Apr 2023 857th JGDoerrer 404 336 171ms 14 Jan 2022 858th blaztoma 🇱🇹 403 276 714ms 9 Nov 2025 859th funnsam 🇭🇰 403 337 171ms 23 Oct 2023 860th Yewzir 🇧🇪 402 225 3ms 19 Nov 2025 861st yzhs 🇩🇪 402 237 22ms 23 Jun 2023 861st dranjohn 402 237 12ms 11 Sep 2023 863rd Adix-null 🇱🇹 401 239 413ms 25 Feb 2023 864th BBoehm 🇩🇪 400 212 11ms 30 Jan 2024 865th estomagordo 🇳🇱 399 239 12ms 16 Nov 2022 865th Trusly 399 239 14ms 24 Feb 2024 865th jameswmccarty 399 239 12ms 29 Sep 2024 865th ImpressedByRocks 399 239 17ms 24 Feb 2025 869th Apataras 399 282 726ms 29 Jul 2025 870th JRaspass 🇬🇧 398 321 347ms 23 Sep 2022 871st amadeusdotpng 397 240 11ms 15 Jun 2023 871st raspofabs 397 240 20ms 10 Jul 2023 873rd Florian-Mt 396 214 11ms 9 Jul 2024 874th adriweb 🇫🇷 396 236 3ms 9 Aug 2023 875th OrangeBacon 396 241 12ms 1 Aug 2024 876th aresok 396 284 655ms 2 Jul 2023 877th Wildst 394 242 12ms 20 Jul 2022 877th ThatAlo 394 242 11ms 12 Jun 2023 879th evnu 394 327 115ms 11 Jun 2023 880th ChrisTheisen 393 244 465ms 14 Dec 2022 First Prev 801–880 of 1,278 Next Last