The Calendar hole will go live in approximately 13 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 475th hiichbindermax 690 76 11ms 22 Jun 2024 475th JunkIce 690 76 11ms 24 Nov 2024 475th Flekay 🇩🇪 690 76 13ms 10 Jul 2025 475th csharpython 690 76 10ms 28 Aug 2025 475th qpwoeirut 690 76 11ms 19 Sep 2025 486th akshatj27 🇦🇶 689 83 23ms 2 Mar 2022 486th AlephSquirrel 689 83 13ms 15 Feb 2023 488th MeWhenI 🇻🇦 689 132 144ms 22 Jul 2024 489th AdrienHache 🇫🇷 688 116 428ms 13 Aug 2025 490th emgordon154 688 230 1,700ms 9 Jun 2025 491st AlephSquirrel 684 73 405ms 16 Jan 2024 492nd janbehrens 🇩🇪 683 127 76ms 22 Dec 2023 493rd Shanethegamer 🇺🇸 682 72 408ms 1 Mar 2022 494th DialFrost 🇸🇬 682 112 1,272ms 10 May 2025 495th DialFrost 🇸🇬 682 124 57ms 6 Dec 2024 496th DialFrost 🇸🇬 681 48 37ms 28 Jan 2023 496th neel11235813 681 48 34ms 18 Feb 2023 498th Anonymousellama21 681 77 12ms 15 Jun 2022 498th jakobkordez 🇸🇮 681 77 11ms 7 Nov 2022 498th betaveros 681 77 11ms 1 Jan 2023 498th quimey 681 77 10ms 15 Mar 2023 498th elgan65536 681 77 10ms 30 Mar 2024 498th thienudomsrirungruang 681 77 30ms 7 May 2024 498th MeWhenI 🇻🇦 681 77 136ms 3 Aug 2024 505th janbehrens 🇩🇪 681 84 22ms 1 Mar 2022 505th tayloia 🇬🇧 681 84 20ms 9 May 2023 505th lukegustafson 🇺🇸 681 84 94ms 15 Sep 2024 508th stefangimmillaro 681 110 41ms 4 Nov 2022 509th MeWhenI 🇻🇦 680 82 78ms 11 Oct 2023 510th stefangimmillaro 679 108 4,070ms 10 Nov 2024 511th stefangimmillaro 679 134 131ms 26 Oct 2023 511th mousetail 🇳🇱 679 134 153ms 26 Sep 2025 513th error256 678 92 1,213ms 13 Aug 2025 514th edsrzf 🇳🇿 678 105 159ms 29 May 2025 515th DialFrost 🇸🇬 677 91 108ms 2 May 2025 516th DaCuteRaccoon 677 125 58ms 1 Dec 2022 516th CaedenHarper 🇨🇦 677 125 57ms 27 Jan 2025 518th c0d3-4-F00d 🇩🇪 676 102 8ms 5 Mar 2022 518th janbehrens 🇩🇪 676 102 8ms 16 May 2023 518th CaedenHarper 🇨🇦 676 102 9ms 27 Jan 2025 518th iczelia 🇩🇪 676 102 8ms 17 Oct 2025 522nd Irratix 🇳🇱 675 66 77ms 9 Mar 2022 523rd KrausRaus 🇺🇸 673 85 26ms 2 Mar 2022 524th knutae 🇳🇴 672 78 14ms 9 Mar 2022 524th jhpaques 🇫🇷 672 78 11ms 29 Jul 2022 524th marcin7Cd 672 78 12ms 2 Sep 2022 524th hellwue 672 78 10ms 28 Apr 2023 524th davecame 672 78 11ms 7 Nov 2023 529th c0d3-4-F00d 🇩🇪 672 126 57ms 5 Mar 2022 529th snoozingnewt 🇨🇦 672 126 57ms 1 Sep 2024 531st MeWhenI 🇻🇦 670 92 110ms 24 Feb 2023 532nd m-tkach 🇺🇦 670 103 12ms 30 Mar 2022 533rd Yax42 🇫🇷 670 119 486ms 27 Apr 2025 534th Shanethegamer 🇺🇸 669 83 1,170ms 7 Jun 2022 535th tuffnatty 🇩🇪 668 99 145ms 19 Jul 2023 536th tailorspy 667 130 76ms 22 Aug 2024 537th CLOStrophobic 🇮🇹 666 127 2,710ms 4 Feb 2025 538th dillon-duncando 665 70 102ms 10 Mar 2024 538th snoozingnewt 🇨🇦 665 70 178ms 19 Oct 2025 540th BambooleanLogic 🇸🇪 665 86 43ms 15 Nov 2022 540th Maznek 665 86 21ms 11 Dec 2023 542nd Lydxn 🇨🇦 665 138 459ms 5 Mar 2022 543rd ehulinsky 🇺🇸 664 79 30ms 10 May 2023 543rd SB-945 664 79 11ms 3 Jul 2023 543rd dokutan 664 79 11ms 23 Feb 2025 543rd robin-scragg 664 79 11ms 4 Aug 2025 543rd luuumine 🇫🇷 664 79 10ms 26 Oct 2025 548th edsrzf 🇳🇿 661 101 91ms 1 Sep 2025 549th Shanethegamer 🇺🇸 661 218 446ms 28 Apr 2025 550th primo-ppcg 🇹🇭 660 139 397ms 4 Mar 2022 551st MeWhenI 🇻🇦 658 103 99ms 14 Oct 2022 552nd JunkIce 657 76 528ms 3 Dec 2024 553rd martinnorling 🇸🇪 656 80 11ms 2 Mar 2022 553rd logvp 656 80 10ms 22 Nov 2024 553rd kistlerf 🇨🇭 656 80 11ms 30 May 2025 556th albanian-laundromat 655 171 619ms 14 days ago 557th KatieLG 🇬🇧 654 74 915ms 29 Aug 2024 557th emgordon154 654 74 1,044ms 13 Nov 2024 559th CatsAreFluffy 654 85 55ms 31 Jan 2023 560th MeWhenI 🇻🇦 653 85 1,051ms 28 May 2023 First Prev 481–560 of 1,539 Next Last