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 481st h3ra993huskp 🇯🇵 801 133 451ms 18 days ago 482nd m-tkach 🇺🇦 800 137 62ms 15 Jan 2022 482nd sean-niemann 🇺🇸 800 137 78ms 3 Feb 2024 484th MeWhenI 🇻🇦 799 101 4ms 23 May 2023 485th mtirado1 799 108 2ms 6 May 2023 486th edsrzf 🇳🇿 798 114 7ms 22 Aug 2025 487th MeWhenI 🇻🇦 798 137 2ms 12 Sep 2022 488th typeswitch-dev 🇵🇹 797 121 8ms 14 Aug 2023 489th Shanethegamer 🇺🇸 796 84 79ms 9 Jun 2022 490th Shanethegamer 🇺🇸 796 168 25ms 28 Apr 2022 491st Shanethegamer 🇺🇸 795 159 30ms 20 Jul 2023 492nd igmcdowell 794 89 10ms 24 Feb 2022 492nd inventshah 794 89 8ms 21 Jun 2022 492nd olleicua 🇺🇸 794 89 9ms 3 Feb 2024 492nd kpal81xd 794 89 9ms 15 Sep 2024 492nd KatieLG 🇬🇧 794 89 9ms 5 Oct 2025 497th sean-niemann 🇺🇸 794 118 2ms 3 Feb 2024 498th Yewzir 🇧🇪 794 185 1,707ms 21 May 2024 499th gitbedd 🇬🇧 793 87 10ms 10 Jan 2022 499th yzhs 🇩🇪 793 87 11ms 21 Mar 2022 499th CheeseCake628 🇳🇴 793 87 10ms 16 Feb 2023 499th HumanoidCPU 793 87 10ms 2 Mar 2025 503rd stefangimmillaro 792 152 145ms 28 Oct 2023 504th dokutan 791 79 400ms 15 Aug 2024 504th Babafaba 791 79 340ms 7 Nov 2025 506th kg583 🇺🇸 791 102 4ms 18 days ago 507th edsrzf 🇳🇿 790 160 32ms 5 May 2025 507th m-tkach 🇺🇦 790 160 32ms 5 May 2025 509th Shanethegamer 🇺🇸 789 115 342ms 21 Apr 2022 510th error256 789 238 506ms 18 Apr 2025 511th LHLaurini 🇧🇷 788 119 1ms 17 Jul 2024 511th solisolu 788 119 2ms 23 days ago 513th Steffan153 🇫🇮 787 57 72ms 29 Aug 2024 513th pardouin 🇫🇷 787 57 58ms 2 Sep 2025 515th prplz 🇦🇺 787 70 287ms 19 Jan 2022 515th SirBogman 🇺🇸 787 70 232ms 19 May 2022 517th ovs-code 🇩🇪 786 85 83ms 27 May 2024 518th ovs-code 🇩🇪 786 153 234ms 21 Jun 2023 519th weliveinhell 🇭🇹 785 90 8ms 11 Jan 2024 520th KrausRaus 🇺🇸 785 106 4ms 11 Nov 2023 521st sean-niemann 🇺🇸 785 127 40ms 1 Dec 2023 522nd Lydxn 🇨🇦 784 53 3ms 27 Feb 2023 523rd CaedenHarper 🇨🇦 784 78 758ms 30 Sep 2025 524th tomh1012 784 98 396ms 31 Jan 2022 524th pkim 784 98 358ms 6 Apr 2023 524th danielxbauer 784 98 356ms 6 Apr 2023 524th meinsiedler 784 98 363ms 6 Apr 2023 524th postie77 784 98 372ms 8 May 2023 529th MeWhenI 🇻🇦 783 112 158ms 4 Aug 2023 530th Salutations45 781 66 1ms 2 Jan 2025 531st GrayJoKing 🇦🇺 781 93 70ms 9 Dec 2023 532nd lynn 781 154 153ms 11 Mar 2022 532nd The3gs 781 154 159ms 18 Aug 2023 534th DialFrost 🇸🇬 781 166 41ms 7 May 2025 535th adyache 🇺🇸 779 91 8ms 2 Aug 2023 536th edsrzf 🇳🇿 779 133 1,295ms 26 Apr 2025 537th DialFrost 🇸🇬 779 241 474ms 18 Apr 2025 538th msbranicky 778 112 2ms 10 Oct 2023 539th adamnielson42 🇺🇸 777 91 9ms 26 Apr 2023 539th luuumine 🇫🇷 777 91 9ms 12 Nov 2025 541st AlephSquirrel 777 130 6ms 21 Oct 2024 542nd LHLaurini 🇧🇷 777 141 59ms 17 Jul 2024 543rd Skleni 776 99 366ms 6 Apr 2023 544th DialFrost 🇸🇬 776 113 101ms 24 May 2025 545th hellwue 775 89 10ms 8 Feb 2023 545th elgan65536 775 89 17ms 29 Mar 2024 545th AdamMorris377 775 89 10ms 29 Jul 2024 545th RaBa21 🇭🇺 775 89 17ms 19 Jul 2025 549th MichalMarsalek 🇨🇿 775 117 360ms 21 Apr 2022 550th retrohun 775 121 2ms 30 Dec 2022 550th abc7-12 775 121 1ms 26 Jun 2024 552nd dokutan 774 79 763ms 8 Sep 2025 553rd xsot 🇸🇬 773 58 39ms 6 Jul 2025 553rd sean-niemann 🇺🇸 773 58 32ms 3 Aug 2025 555th kmathis22 772 138 444ms 30 Oct 2025 556th emgordon154 771 81 395ms 1 Aug 2024 557th clockworknazo 771 85 4ms 25 Mar 2023 558th call23re 771 112 2ms 12 Jan 2022 559th primo-ppcg 🇹🇭 771 131 6ms 20 Jan 2023 560th strout 771 145 148ms 15 Aug 2022 First Prev 481–560 of 1,556 Next Last