The Calendar hole will go live in approximately 11 days. Why not try and solve it ahead of time?
Lucky Numbers 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 641st KatieLG 🇬🇧 596 96 22ms 21 Feb 2023 641st thisishowmymindworks 🇳🇴 596 96 20ms 28 Jun 2024 643rd HumanoidCPU 595 84 463ms 27 May 2024 643rd KatieLG 🇬🇧 595 84 430ms 17 Aug 2024 645th strout 595 106 528ms 17 Aug 2022 646th edsrzf 🇳🇿 592 129 11ms 11 Nov 2025 647th Re-Adventures 🇮🇳 591 154 153ms 20 Jul 2023 648th albanian-laundromat 590 98 1,492ms 5 Nov 2025 649th Troon 589 89 39ms 29 Sep 2022 649th b10011 🇫🇮 589 89 35ms 8 Jan 2023 649th AbhilashaTandon 589 89 11ms 24 Sep 2023 649th eddvrs 589 89 10ms 20 Dec 2023 653rd junkondo-jp 589 97 30ms 25 Jun 2024 653rd CaedenHarper 🇨🇦 589 97 19ms 27 Jan 2025 655th DaCuteRaccoon 588 326 824ms 1 Dec 2022 656th emgordon154 587 47 51ms 3 Nov 2024 657th MeWhenI 🇻🇦 587 110 15ms 21 Jul 2023 658th albanian-laundromat 587 137 89ms 4 Sep 2025 659th jfallon1997 583 90 31ms 7 Sep 2022 659th xDragoxboi 583 90 12ms 30 Jun 2025 659th jacekwladzinski 583 90 11ms 5 Oct 2025 662nd trinityy-7 583 98 13ms 17 Mar 2024 662nd snoozingnewt 🇨🇦 583 98 19ms 29 Sep 2025 662nd iczelia 🇩🇪 583 98 18ms 17 Oct 2025 665th keelimeguy 🇺🇸 583 192 268ms 28 Apr 2025 666th Shanethegamer 🇺🇸 581 79 39ms 7 Jun 2022 667th kimbo 🇺🇸 580 193 268ms 13 Jan 2023 668th MeWhenI 🇻🇦 579 87 1,820ms 28 Jan 2023 669th CaedenHarper 🇨🇦 579 331 340ms 27 Jan 2025 670th Shanethegamer 🇺🇸 578 117 35ms 12 Sep 2022 671st CaedenHarper 🇨🇦 577 194 275ms 17 days ago 672nd albanian-laundromat 577 332 3,099ms 12 days ago 673rd commandblockguy 🇺🇸 576 91 102ms 21 Sep 2022 673rd MaxElf999 576 91 3,023ms 28 Sep 2022 673rd fkantelberg 576 91 54ms 7 Aug 2023 673rd sultan 576 91 29ms 5 Mar 2024 677th 5cw 🇺🇸 575 48 7ms 10 Apr 2023 678th msbranicky 574 87 473ms 17 Jan 2024 679th MeWhenI 🇻🇦 573 101 963ms 15 Sep 2025 680th 77Tigers 573 110 319ms 29 May 2024 680th iczelia 🇩🇪 573 110 274ms 17 Oct 2025 682nd anter69 🇭🇺 572 78 106ms 12 Feb 2024 683rd advl 572 100 84ms 14 Feb 2025 684th Ailko 🇧🇪 570 92 10ms 6 May 2022 684th ComputerKWasTaken 🇺🇸 570 92 11ms 23 Oct 2024 686th commandblockguy 🇺🇸 568 88 594ms 1 Sep 2025 687th emgordon154 568 160 210ms 5 Mar 2025 688th a6166231 🇨🇳 566 101 11ms 5 Jun 2025 689th MeWhenI 🇻🇦 566 149 42ms 6 Jun 2023 690th KatieLG 🇬🇧 565 109 178ms 22 Jan 2023 691st madex 🇩🇪 565 122 3ms 29 Mar 2022 692nd KatieLG 🇬🇧 565 198 373ms 22 Jan 2023 693rd TobyBoyne 🇬🇧 564 93 3,068ms 3 Mar 2022 693rd jtaxen 564 93 98ms 26 Mar 2024 693rd jameswmccarty 564 93 11ms 10 Jul 2024 693rd codingisgreatbutiamnot 564 93 630ms 6 Aug 2025 697th Shanethegamer 🇺🇸 564 150 96ms 4 Oct 2024 698th rak1507 🇬🇧 563 49 2ms 2 Mar 2022 699th h3ra993huskp 🇯🇵 563 163 494ms 20 days ago 700th KatieLG 🇬🇧 562 142 472ms 13 Nov 2022 701st pzagrebin 561 99 64ms 9 Jul 2022 701st janbehrens 🇩🇪 561 99 123ms 2 Jul 2023 703rd DaCuteRaccoon 561 102 17ms 30 Nov 2022 703rd dylanarmstrong 561 102 11ms 21 Jan 2024 703rd acollett89 561 102 29ms 18 Jul 2025 706th heanyang1 560 200 260ms 29 May 2025 707th NickTheEASDude 🇺🇸 559 121 16ms 1 May 2024 708th adamnielson42 🇺🇸 558 94 59ms 21 Aug 2023 708th brochmann 🇸🇪 558 94 11ms 28 Oct 2023 708th 40fied4t 558 94 35ms 1 Jun 2025 711th olleicua 🇺🇸 557 80 81ms 21 Feb 2025 712th kkoenig 557 201 274ms 7 Sep 2025 713th HumanoidCPU 556 119 133ms 7 Nov 2024 714th Lv0Sys 🇵🇱 555 103 32ms 14 days ago 715th HumanoidCPU 554 202 268ms 26 Aug 2024 716th albanian-laundromat 554 260 1,952ms 23 Oct 2025 717th varhammer 🇷🇺 553 153 210ms 13 Dec 2023 718th CatsAreFluffy 553 157 78ms 10 Jan 2023 719th m42km 552 95 48ms 16 Dec 2023 719th Natanaelel 🇸🇪 552 95 29ms 15 Jul 2025 First Prev 641–720 of 1,540 Next Last