The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
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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 401st dokutan 838 114 2ms 5 Feb 2021 402nd acotis 838 144 154ms 20 Jun 2025 403rd KatieLG 🇬🇧 837 62 1,038ms 3 May 2021 403rd MeWhenI 🇻🇦 837 62 985ms 15 Dec 2021 405th ZakkkkAttackkkk 🇵🇭 837 86 9ms 2 Jun 2022 405th davecame 837 86 12ms 29 Feb 2024 405th Seek64 🇩🇪 837 86 29ms 6 hours ago 408th edsrzf 🇳🇿 832 67 8ms 22 Jul 2025 409th KatieLG 🇬🇧 831 60 38ms 10 Apr 2022 409th aksyristos 831 60 44ms 31 Jan 2023 411th DialFrost 🇸🇬 831 121 98ms 17 days ago 412th primo-ppcg 🇹🇭 829 107 37ms 27 Jun 2022 413th inventshah 829 122 464ms 29 Jan 2023 413th xsot 🇸🇬 829 122 76ms 22 Jul 2024 415th lynn 828 87 10ms 7 Apr 2021 415th orthoplex 🇨🇽 828 87 10ms 29 Jul 2021 415th Steffan153 🇫🇮 828 87 10ms 15 Aug 2024 415th bizy-coder 828 87 10ms 5 Sep 2024 419th Alessandro-Balconi 🇮🇹 827 64 100ms 26 Mar 2023 420th yzhs 🇩🇪 827 92 114ms 25 Jun 2023 421st Shanethegamer 🇺🇸 826 127 198ms 7 Jan 2023 422nd primo-ppcg 🇹🇭 823 133 1,309ms 30 Nov 2021 422nd Shanethegamer 🇺🇸 823 133 1,254ms 24 Dec 2023 424th error256 822 91 5ms 15 Feb 2025 425th 09cf 822 123 427ms 8 days ago 426th chunes3 🇺🇸 821 96 73ms 18 Sep 2023 427th NewDefectus 🇮🇱 820 44 3ms 22 Jun 2021 427th ovs-code 🇩🇪 820 44 3ms 22 Jun 2023 427th Shanethegamer 🇺🇸 820 44 3ms 8 Nov 2023 427th blaztoma 🇱🇹 820 44 3ms 13 Nov 2025 431st edsrzf 🇳🇿 819 139 41ms 27 Aug 2025 432nd Secozzi 818 61 40ms 5 May 2021 432nd annaproxy 818 61 36ms 4 Jan 2022 432nd PikeIt 818 61 36ms 26 Jun 2023 435th primo-ppcg 🇹🇭 818 88 14ms 1 Dec 2020 435th sisyphus-ppcg 🇦🇺 818 88 15ms 2 Dec 2020 435th TFeld00 🇩🇰 818 88 15ms 2 Dec 2020 435th btjones0 818 88 14ms 31 Dec 2020 435th kops-cg 818 88 17ms 11 Apr 2021 435th SirBogman 🇺🇸 818 88 16ms 29 Dec 2021 435th inventshah 818 88 14ms 7 Jan 2022 435th anter69 🇭🇺 818 88 16ms 25 Jan 2022 435th jared-hughes 818 88 15ms 7 Jul 2022 435th annaproxy 818 88 14ms 20 Nov 2022 435th rak1507 🇬🇧 818 88 15ms 5 Jan 2023 435th neel11235813 818 88 11ms 17 Jan 2023 435th Shanethegamer 🇺🇸 818 88 14ms 1 Feb 2023 435th bricknellj 818 88 15ms 7 Feb 2023 435th m-tkach 🇺🇦 818 88 14ms 14 Feb 2023 435th Fracture17 818 88 15ms 12 Apr 2023 435th zacjl 818 88 16ms 19 Apr 2023 435th kg583 🇺🇸 818 88 15ms 23 Jul 2023 435th StefanHabel 🇨🇦 818 88 15ms 17 Sep 2023 435th bzijlema 🇳🇱 818 88 16ms 30 Nov 2023 435th 051 🇸🇬 818 88 14ms 26 Dec 2023 435th ndren 818 88 15ms 6 Jan 2024 435th CaedenHarper 🇨🇦 818 88 15ms 2 Aug 2024 435th emgordon154 818 88 15ms 20 Sep 2024 435th Bulmenisaurus 818 88 15ms 10 Nov 2024 435th lifthrasiir 🇰🇷 818 88 33ms 14 Nov 2024 435th Mukundan314 818 88 15ms 28 Apr 2025 435th fuzzylojik-golf 🇺🇸 818 88 15ms 6 May 2025 435th sean-niemann 🇺🇸 818 88 11ms 9 May 2025 435th ryyyn 🇺🇸 818 88 15ms 11 Jun 2025 435th edsrzf 🇳🇿 818 88 15ms 12 Jun 2025 435th Lv0Sys 🇵🇱 818 88 16ms 22 Jun 2025 435th xDragoxboi 818 88 15ms 30 Jun 2025 435th blaztoma 🇱🇹 818 88 15ms 1 Oct 2025 435th CornerMercury 🇬🇧 818 88 14ms 2 Oct 2025 435th Babafaba 818 88 16ms 18 Oct 2025 435th ApoChagi 818 88 15ms 18 Oct 2025 472nd MeWhenI 🇻🇦 818 101 269ms 15 Nov 2022 473rd Steffan153 🇫🇮 817 80 380ms 15 Aug 2024 473rd CaedenHarper 🇨🇦 817 80 405ms 29 Jul 2025 475th KrausRaus 🇺🇸 816 71 9ms 2 May 2021 475th Garklein 🇨🇦 816 71 9ms 9 Jan 2022 477th m-tkach 🇺🇦 816 185 6ms 15 Jan 2025 478th nwellnhof 🇩🇪 814 46 32ms 4 Oct 2021 479th Steffan153 🇫🇮 813 92 6ms 4 May 2024 480th CLOStrophobic 🇮🇹 812 123 7ms 22 Feb 2025 First Prev 401–480 of 2,035 Next Last