The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Leap Years in all languages in chars. 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 Chars Time Submitted 156th emgordon154 952 21 43ms 11 Nov 2025 162nd Lydxn 🇨🇦 952 39 365ms 17 Jan 2024 162nd JayXon 🇺🇸 952 39 380ms 18 Jan 2024 164th JayXon 🇺🇸 951 55 1ms 9 Feb 2022 164th rhdqor213 951 55 6ms 2 Aug 2024 166th primo-ppcg 🇹🇭 949 33 14ms 8 Feb 2022 166th HPWiz 🇳🇿 949 33 14ms 8 Mar 2022 168th Lydxn 🇨🇦 948 36 71ms 12 Dec 2022 168th sisyphus-ppcg 🇦🇺 948 36 97ms 12 Dec 2022 168th ovs-code 🇩🇪 948 36 80ms 22 Apr 2024 171st primo-ppcg 🇹🇭 948 42 122ms 2 May 2020 171st JayXon 🇺🇸 948 42 118ms 23 Aug 2021 171st Lydxn 🇨🇦 948 42 123ms 23 Aug 2021 174th Lydxn 🇨🇦 948 43 87ms 23 Sep 2021 174th JayXon 🇺🇸 948 43 89ms 9 Feb 2022 176th sisyphus-ppcg 🇦🇺 947 23 3ms 12 Jul 2023 176th Lydxn 🇨🇦 947 23 2ms 12 Jul 2023 176th SirBogman 🇺🇸 947 23 2ms 9 Nov 2023 176th lifthrasiir 🇰🇷 947 23 4ms 1 Dec 2024 176th shadowninja55 🇺🇸 947 23 2ms 6 Jan 2025 176th zacjl 947 23 2ms 6 Jan 2025 176th Garklein 🇨🇦 947 23 2ms 6 Jan 2025 176th AlephSquirrel 947 23 3ms 4 Nov 2025 184th sisyphus-ppcg 🇦🇺 947 24 182ms 21 Jun 2021 185th Lydxn 🇨🇦 947 75 75ms 9 Feb 2022 185th JayXon 🇺🇸 947 75 67ms 9 Feb 2022 187th btnlq 943 35 3ms 17 Aug 2024 187th ovs-code 🇩🇪 943 35 3ms 20 Aug 2024 189th btnlq 942 58 322ms 9 Feb 2022 189th Yax42 🇫🇷 942 58 351ms 31 May 2025 191st Yax42 🇫🇷 942 64 426ms 4 Oct 2025 192nd Rubiksmath 941 45 9ms 18 Jul 2023 192nd kg583 🇺🇸 941 45 10ms 30 Jul 2023 192nd pardouin 🇫🇷 941 45 9ms 4 Jan 2024 192nd Seek64 🇩🇪 941 45 9ms 17 May 2024 192nd Steffan153 🇫🇮 941 45 16ms 4 Jul 2024 192nd sean-niemann 🇺🇸 941 45 16ms 16 Jul 2024 192nd CornerMercury 🇬🇧 941 45 9ms 12 Oct 2025 199th primo-ppcg 🇹🇭 941 47 4ms 4 Dec 2018 199th Lydxn 🇨🇦 941 47 6ms 9 Feb 2022 201st Lydxn 🇨🇦 940 41 69ms 15 May 2022 201st GrayJoKing 🇦🇺 940 41 73ms 25 May 2022 201st Steffan153 🇫🇮 940 41 72ms 26 Dec 2022 201st JayXon 🇺🇸 940 41 72ms 20 Mar 2023 201st sean-niemann 🇺🇸 940 41 68ms 18 Apr 2025 206th kurkale6ka 939 30 3ms 2 Sep 2021 207th canissimia 🇦🇶 939 44 3ms 17 days ago 208th primo-ppcg 🇹🇭 939 45 39ms 2 May 2020 208th JayXon 🇺🇸 939 45 38ms 23 Aug 2021 208th Lydxn 🇨🇦 939 45 38ms 23 Aug 2021 208th Rubiksmath 939 45 38ms 4 Aug 2023 212th DialFrost 🇸🇬 938 40 2ms 18 Nov 2025 212th rucin93 🇵🇱 938 40 2ms 18 Nov 2025 212th JayXon 🇺🇸 938 40 2ms 19 Nov 2025 212th sean-niemann 🇺🇸 938 40 2ms 19 Nov 2025 212th GrayJoKing 🇦🇺 938 40 1ms 19 Nov 2025 212th ovs-code 🇩🇪 938 40 2ms 19 Nov 2025 212th dokutan 938 40 1ms 19 Nov 2025 212th edsrzf 🇳🇿 938 40 2ms 6 days ago 220th Lydxn 🇨🇦 938 82 266ms 10 Feb 2022 221st nwellnhof 🇩🇪 937 27 32ms 2 Sep 2021 222nd Lydxn 🇨🇦 937 44 100ms 23 Aug 2021 223rd primo-ppcg 🇹🇭 937 45 1ms 2 May 2020 224th primo-ppcg 🇹🇭 937 49 1,222ms 11 May 2020 224th lynn 937 49 1,221ms 27 May 2021 224th JayXon 🇺🇸 937 49 1,223ms 23 Aug 2021 224th Lydxn 🇨🇦 937 49 1,253ms 23 Aug 2021 228th ovs-code 🇩🇪 936 42 68ms 12 Sep 2024 228th GrayJoKing 🇦🇺 936 42 66ms 13 Sep 2024 228th Kacarott 🇦🇺 936 42 68ms 13 Sep 2024 228th error256 936 42 66ms 13 Sep 2024 228th dokutan 936 42 65ms 13 Sep 2024 228th edsrzf 🇳🇿 936 42 65ms 25 Sep 2024 228th pardouin 🇫🇷 936 42 66ms 25 Sep 2024 228th DialFrost 🇸🇬 936 42 69ms 25 Sep 2024 228th Shanethegamer 🇺🇸 936 42 67ms 22 Nov 2024 228th primo-ppcg 🇹🇭 936 42 62ms 5 Apr 2025 228th sean-niemann 🇺🇸 936 42 64ms 7 Apr 2025 228th fuzzylojik-golf 🇺🇸 936 42 62ms 17 Sep 2025 240th primo-ppcg 🇹🇭 936 50 115ms 1 Apr 2019 First Prev 161–240 of 4,741 Next Last