Leap Years in JavaScript 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 227th AndFly33 833 48 10ms 7 Jul 2023 227th AustinH-Ntt 833 48 9ms 7 Jul 2023 227th johnburton0517 833 48 10ms 7 Jul 2023 227th coreynash 833 48 11ms 27 Oct 2023 227th sparksis 🇨🇦 833 48 9ms 20 Nov 2023 227th TheLastZombie 833 48 9ms 15 May 2024 227th Jacob385 833 48 9ms 3 Sep 2024 227th eranws 833 48 9ms 23 Dec 2024 249th juntuu 816 49 10ms 24 Mar 2019 249th Mikaeel66 816 49 9ms 11 Nov 2019 249th jeffreymeng 816 49 10ms 24 Nov 2019 249th Kibble 816 49 10ms 11 Jul 2020 249th richard-oelze 🇩🇪 816 49 9ms 11 Jul 2020 249th masashimachida 816 49 11ms 29 Jul 2020 249th ArmaanAS 816 49 10ms 8 Mar 2021 249th RedstoneTim 816 49 9ms 26 Jun 2021 249th Foxinatel 816 49 9ms 22 Aug 2021 249th olivermrose 🇺🇸 816 49 9ms 23 Aug 2021 249th lukaskairys 816 49 9ms 25 Sep 2021 249th Giga-Bowser 816 49 9ms 5 Jan 2022 249th c0d3-4-F00d 🇩🇪 816 49 9ms 9 Feb 2022 249th TheRealOhead 🇺🇸 816 49 9ms 31 Mar 2023 249th Inbarw100 816 49 9ms 10 Jun 2023 249th Evankhell0 816 49 9ms 28 Jul 2023 249th NickTheEASDude 🇺🇸 816 49 9ms 18 Jan 2024 249th dijs 816 49 9ms 8 Mar 2024 249th xyangst 816 49 11ms 26 Sep 2024 249th ffelixm 816 49 9ms 30 May 2025 249th a6166231 🇨🇳 816 49 9ms 3 Jun 2025 249th johnkiernander 816 49 9ms 16 Dec 2025 271st mikerees 800 50 9ms 1 Aug 2019 271st jakobwitte 800 50 12ms 5 Mar 2020 271st vgroen 800 50 10ms 31 May 2020 271st ibeucaly 800 50 9ms 22 Oct 2021 271st Romain-1 🇫🇷 800 50 9ms 29 Apr 2022 271st 7f-galaxii 800 50 10ms 7 Dec 2022 271st dgerblick 800 50 10ms 16 Jun 2023 271st deniz-blue 800 50 10ms 20 Oct 2023 271st SpiritAxolotl 🇺🇸 800 50 9ms 21 Mar 2024 271st codingisgreatbutiamnot 800 50 8ms 14 Aug 2024 271st henrygagnier 800 50 9ms 19 Nov 2024 271st alexsave 800 50 10ms 13 Oct 2025 283rd ly0va 784 51 9ms 6 Jan 2019 283rd tomh1012 784 51 9ms 5 Sep 2020 283rd VegaQ8 784 51 9ms 26 Nov 2020 283rd Seanharrs 🇦🇺 784 51 9ms 15 Dec 2021 283rd fourth-bit 784 51 10ms 14 Jan 2022 283rd Ashikpaul 🇮🇳 784 51 10ms 24 Jul 2022 283rd Bananapants22 784 51 10ms 20 Aug 2022 283rd GreenBeansAgainstVeganism 784 51 9ms 14 Jan 2023 283rd daniel-cardone 784 51 11ms 24 Aug 2023 283rd Florian-Mt 784 51 10ms 29 Sep 2023 283rd sulphemi 784 51 11ms 5 Mar 2024 283rd dtbao20 🇻🇳 784 51 9ms 1 Oct 2024 283rd Ralac07 🇦🇺 784 51 12ms 27 Oct 2025 296th Chegleyev 769 52 9ms 2 Feb 2020 296th abcxff 769 52 9ms 11 Apr 2021 296th mandm-pt 769 52 13ms 1 Jul 2021 296th Destrings2 🇨🇴 769 52 10ms 14 Jul 2021 296th stefangabos 🇷🇴 769 52 9ms 15 Jul 2021 296th aazuspan 769 52 9ms 3 May 2022 296th Ephellon 769 52 10ms 2 Dec 2022 296th ShiraJoseph 🇺🇸 769 52 9ms 12 Apr 2023 296th lewdev 🇺🇸 769 52 11ms 3 Jul 2024 296th UllmaDan 769 52 8ms 27 Aug 2024 306th McErer 755 53 10ms 11 Jan 2019 306th felixpackard 755 53 10ms 15 Mar 2020 306th dylanpyle 755 53 9ms 28 Apr 2020 306th dsntzn 🇸🇰 755 53 10ms 9 Aug 2020 306th SkimnerPhi 755 53 8ms 5 Dec 2020 306th pbarath 755 53 9ms 6 Apr 2021 306th 23rdIdiot 755 53 10ms 28 Aug 2021 306th liamstrilchuk 755 53 10ms 7 Sep 2021 306th AnnoyedArt1256 755 53 10ms 12 Jan 2022 306th JayantaNath 755 53 11ms 13 May 2022 306th blobotic 755 53 10ms 13 Jun 2023 306th malworthy 755 53 10ms 18 Oct 2023 306th jbdrucker 755 53 10ms 15 Feb 2025 306th smclaughlin-cf 755 53 9ms 20 Feb 2025 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