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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 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 392nd bwenstar 678 59 12ms 11 Aug 2022 392nd WoodStuff 🇵🇱 678 59 9ms 3 Jun 2023 392nd kwilson151 678 59 10ms 7 Jul 2023 392nd Yareeeema 678 59 9ms 11 Oct 2023 392nd iCyuba 678 59 12ms 15 Oct 2023 392nd Palladium02 678 59 10ms 26 May 2025 407th ciaranmag 667 60 11ms 25 Jan 2019 407th TTWNO 667 60 10ms 8 Apr 2019 407th islonely 667 60 12ms 26 Apr 2019 407th florton 667 60 12ms 19 Mar 2021 407th peculiarination 667 60 10ms 30 Apr 2021 407th baby-steve 667 60 14ms 5 May 2021 407th BillyBobFry 667 60 12ms 22 Oct 2021 407th gurglemurgle5 667 60 11ms 15 Feb 2022 407th mayrop 667 60 11ms 4 Nov 2022 407th janleigh 🇵🇭 667 60 12ms 23 Sep 2023 407th xShadowBlade 667 60 10ms 19 May 2024 418th Pandapip1 656 61 10ms 11 Feb 2021 418th evalPenny 🇰🇷 656 61 10ms 6 Jul 2021 418th scottjones4k 656 61 10ms 5 Jul 2022 421st ptforness 645 62 10ms 1 Jan 2023 422nd vidmantasa 635 63 9ms 23 Sep 2021 422nd jamespeilunli 635 63 11ms 20 Mar 2022 422nd adamnielson42 🇺🇸 635 63 13ms 24 Apr 2023 422nd notesz5 635 63 11ms 5 Sep 2023 422nd Voltrifrodec 🇸🇰 635 63 11ms 23 Apr 2025 422nd MyXoToD 🇩🇪 635 63 10ms 20 May 2025 428th TrAyZeN 625 64 9ms 19 Aug 2019 428th yencis 625 64 10ms 18 Feb 2020 428th ahorihan 625 64 11ms 3 Aug 2022 428th Dddatt 625 64 11ms 22 Jan 2025 432nd shreyasminocha 615 65 10ms 2 Aug 2020 432nd lucipas 615 65 11ms 10 May 2024 434th effin 606 66 13ms 10 May 2019 434th MaartenStaa 606 66 10ms 5 Jan 2020 434th Designer023 606 66 11ms 8 Feb 2020 434th JustinDowty 606 66 12ms 12 Jun 2020 434th SebassNoob 606 66 10ms 5 Aug 2025 439th jonot-cyber 597 67 12ms 16 Jun 2019 439th WilleyOhana 597 67 10ms 26 Feb 2021 439th davyboyhayes 597 67 11ms 24 Jan 2023 442nd tadeokondrak 588 68 9ms 22 Feb 2019 442nd OmegaB0t 588 68 10ms 5 Dec 2019 444th marekMin 580 69 10ms 11 Jun 2019 444th jayanwar 580 69 11ms 5 Nov 2019 446th null-tangent 571 70 11ms 3 Aug 2022 446th ShepardToTheStars 571 70 10ms 5 Jan 2024 448th squadb3 548 73 10ms 11 Oct 2019 448th ABoxAlt 548 73 12ms 16 Nov 2023 450th tickct 541 74 10ms 12 Sep 2019 450th Scoutboy06 541 74 11ms 9 Dec 2019 450th James-revans 541 74 12ms 30 Dec 2019 450th AlexOgn 541 74 12ms 26 Dec 2020 450th E2dgar 541 74 10ms 31 Jan 2022 450th aneurin-h 541 74 11ms 15 Nov 2022 450th dpb4 541 74 11ms 27 Feb 2024 450th tik25 541 74 9ms 28 Mar 2024 458th Bejofo 533 75 14ms 17 Mar 2021 458th dukeaccent 🇫🇮 533 75 11ms 29 Nov 2022 460th Hyperoplex145 526 76 11ms 3 Dec 2025 461st joedia 513 78 10ms 2 Jan 2021 462nd ershadi-sayuri 506 79 10ms 14 Jan 2022 463rd Randomness74 500 80 9ms 14 Mar 2020 464th Sixaintnine 494 81 10ms 20 Feb 2020 465th Havock94 488 82 10ms 14 Aug 2019 466th RoscoeDaWah 🇬🇧 482 83 10ms 13 Feb 2022 466th AshishAntil07 482 83 11ms 10 Oct 2022 468th dbkirk4211 460 87 12ms 4 May 2024 469th ThePyProgrammer 449 89 10ms 15 Dec 2021 470th DanSmelly 426 94 12ms 1 May 2020 471st heigertd 400 100 13ms 30 Dec 2019 472nd NoneTheFewer 392 102 11ms 27 Dec 2025 473rd nico-bachner 377 106 10ms 5 Dec 2020 473rd Pyro569 377 106 9ms 3 Nov 2023 475th gdickison 360 111 10ms 21 Dec 2018 476th hacker19374 345 116 11ms 8 Mar 2023 476th kevinnaviapaiva 345 116 11ms 6 Mar 2025 478th ialap206 294 136 13ms 17 Jun 2023 479th icottambbc 247 162 12ms 18 Nov 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