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 Chars Time Submitted 400th emgordon154 840 101 482ms 26 May 2025 402nd c0d3-4-F00d 🇩🇪 839 69 9ms 5 Oct 2021 402nd edsrzf 🇳🇿 839 69 9ms 12 Jun 2025 402nd CaedenHarper 🇨🇦 839 69 9ms 25 Aug 2025 402nd madeforlosers 839 69 9ms 20 Oct 2025 406th ovs-code 🇩🇪 839 94 122ms 18 Sep 2023 407th dokutan 838 114 2ms 5 Feb 2021 408th acotis 838 144 154ms 20 Jun 2025 409th KatieLG 🇬🇧 837 62 1,038ms 3 May 2021 409th MeWhenI 🇻🇦 837 62 985ms 15 Dec 2021 411th GrayJoKing 🇦🇺 837 70 9ms 7 Jul 2022 411th DialFrost 🇸🇬 837 70 14ms 19 Jan 2024 411th snoozingnewt 🇨🇦 837 70 15ms 16 Oct 2025 414th edsrzf 🇳🇿 832 67 8ms 22 Jul 2025 415th DialFrost 🇸🇬 831 121 98ms 17 days ago 416th XorZy 830 59 36ms 29 May 2021 417th Shanethegamer 🇺🇸 830 75 298ms 28 Dec 2023 418th primo-ppcg 🇹🇭 829 107 37ms 27 Jun 2022 419th inventshah 829 122 464ms 29 Jan 2023 419th xsot 🇸🇬 829 122 76ms 22 Jul 2024 421st ovs-code 🇩🇪 828 60 125ms 4 Aug 2024 422nd Alessandro-Balconi 🇮🇹 827 64 100ms 26 Mar 2023 423rd yzhs 🇩🇪 827 92 114ms 25 Jun 2023 424th annaproxy 826 71 17ms 1 Nov 2021 424th GolfingSuccess 🇬🇷 826 71 12ms 26 Nov 2021 424th m-tkach 🇺🇦 826 71 9ms 26 Apr 2022 424th Irratix 🇳🇱 826 71 14ms 7 May 2022 424th duckyluuk 🇳🇱 826 71 16ms 15 Aug 2024 429th Shanethegamer 🇺🇸 826 127 198ms 7 Jan 2023 430th DialFrost 🇸🇬 824 34 54ms 1 Feb 2023 431st primo-ppcg 🇹🇭 823 133 1,309ms 30 Nov 2021 431st Shanethegamer 🇺🇸 823 133 1,254ms 24 Dec 2023 433rd 09cf 822 123 427ms 8 days ago 434th chunes3 🇺🇸 821 96 73ms 18 Sep 2023 435th pardouin 🇫🇷 818 43 3ms 8 Oct 2024 436th MeWhenI 🇻🇦 818 101 269ms 15 Nov 2022 437th Steffan153 🇫🇮 817 68 368ms 17 Jan 2024 437th lifthrasiir 🇰🇷 817 68 361ms 2 Dec 2024 437th sean-niemann 🇺🇸 817 68 367ms 1 Jul 2025 440th aksyristos 816 60 44ms 31 Jan 2023 441st KrausRaus 🇺🇸 816 71 9ms 2 May 2021 441st Garklein 🇨🇦 816 71 9ms 9 Jan 2022 443rd m-tkach 🇺🇦 816 185 6ms 15 Jan 2025 444th yujh-yujh 🇬🇸 814 72 20ms 8 days ago 445th CLOStrophobic 🇮🇹 812 123 7ms 22 Feb 2025 446th boxjelly 810 94 116ms 7 Jan 2021 447th ovs-code 🇩🇪 807 69 12ms 19 Aug 2024 447th weeble 807 69 8ms 1 Jul 2025 449th edsrzf 🇳🇿 807 139 41ms 27 Aug 2025 450th neel11235813 806 69 361ms 15 Jan 2024 450th Shanethegamer 🇺🇸 806 69 372ms 16 Jan 2024 450th emgordon154 806 69 365ms 20 Sep 2024 453rd MeWhenI 🇻🇦 806 110 2ms 10 Oct 2023 454th nwellnhof 🇩🇪 804 93 1ms 20 Dec 2020 454th NewDefectus 🇮🇱 804 93 2ms 8 May 2021 456th Secozzi 803 61 40ms 5 May 2021 456th annaproxy 803 61 36ms 4 Jan 2022 456th PikeIt 803 61 36ms 26 Jun 2023 459th rak1507 🇬🇧 803 73 20ms 2 Jan 2021 459th MeWhenI 🇻🇦 803 73 19ms 22 Oct 2021 459th Just4FunCoder 803 73 14ms 26 Oct 2022 459th FlorianCassayre 🇫🇷 803 73 10ms 23 Sep 2023 463rd ovs-code 🇩🇪 803 95 13ms 30 Jun 2024 464th duckyluuk 🇳🇱 803 119 2ms 18 Jul 2024 464th FlyingPenguin223 803 119 2ms 18 Nov 2024 466th snoozingnewt 🇨🇦 802 66 110ms 19 Oct 2025 467th ovs-code 🇩🇪 802 81 1,218ms 3 Feb 2023 467th sisyphus-ppcg 🇦🇺 802 81 1,227ms 6 Feb 2023 467th edsrzf 🇳🇿 802 81 1,191ms 27 Aug 2025 470th primo-ppcg 🇹🇭 802 103 122ms 6 Aug 2024 471st Yax42 🇫🇷 801 111 389ms 15 Jun 2025 472nd NewDefectus 🇮🇱 800 44 3ms 22 Jun 2021 472nd ovs-code 🇩🇪 800 44 3ms 22 Jun 2023 472nd Shanethegamer 🇺🇸 800 44 3ms 8 Nov 2023 472nd blaztoma 🇱🇹 800 44 3ms 13 Nov 2025 476th perlebach 🇨🇿 799 103 3,685ms 10 Jun 2025 477th albanian-laundromat 798 86 71ms 20 Nov 2025 478th jared-hughes 797 195 10ms 7 Jul 2024 479th stackofbears 796 47 32ms 25 Mar 2024 480th primo-ppcg 🇹🇭 796 75 2ms 13 Nov 2022 First Prev 401–480 of 2,017 Next Last