The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Inventory Sequence in all languages 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 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 stefangimmillaro 855 77 81ms 5 Jun 2023 402nd Shanethegamer 🇺🇸 855 85 468ms 22 Nov 2022 402nd MeWhenI 🇻🇦 855 85 428ms 22 Jul 2024 402nd DialFrost 🇸🇬 855 85 367ms 20 Nov 2025 405th janbehrens 🇩🇪 854 47 5ms 20 Nov 2022 406th GrayJoKing 🇦🇺 854 58 374ms 15 Jan 2024 406th SirBogman 🇺🇸 854 58 446ms 15 Jan 2024 406th AlephSquirrel 854 58 357ms 16 Jan 2024 406th DialFrost 🇸🇬 854 58 447ms 2 Aug 2024 406th emgordon154 854 58 392ms 17 May 2025 411th Natanaelel 🇸🇪 852 45 967ms 22 Jan 2025 412th itsh01 852 58 10ms 21 Nov 2022 412th prplz 🇦🇺 852 58 9ms 25 Nov 2022 412th Larento 852 58 9ms 13 Oct 2023 415th prplz 🇦🇺 852 69 2ms 22 Nov 2022 415th ZakkkkAttackkkk 🇵🇭 852 69 2ms 12 Aug 2023 417th annaproxy 852 81 63ms 11 Dec 2022 418th Steffan153 🇫🇮 850 38 3ms 27 Aug 2024 419th GrayJoKing 🇦🇺 850 65 3ms 9 Oct 2023 420th jared-hughes 850 90 70ms 16 Mar 2023 421st 386asm 🇺🇸 849 73 40ms 8 May 2023 422nd ovs-code 🇩🇪 849 165 462ms 24 Jan 2025 423rd JayXon 🇺🇸 848 65 138ms 22 Nov 2022 424th MeWhenI 🇻🇦 848 112 261ms 22 Jul 2024 425th MeWhenI 🇻🇦 846 78 38ms 14 May 2023 425th inventshah 846 78 4,055ms 12 Nov 2024 427th ovs-code 🇩🇪 846 111 48ms 10 Feb 2023 427th lynn 846 111 41ms 12 Jul 2023 429th revlayle 🇺🇸 843 89 350ms 26 Nov 2022 429th Shanethegamer 🇺🇸 843 89 315ms 20 Mar 2023 431st Shanethegamer 🇺🇸 843 94 450ms 25 Sep 2025 431st KasperKivimaeki 🇫🇮 843 94 420ms 17 days ago 433rd andersk 🇺🇸 843 102 119ms 20 Nov 2022 433rd r-brinke 🇳🇱 843 102 119ms 14 Jun 2023 433rd elgan65536 843 102 122ms 10 Nov 2023 433rd stefangimmillaro 843 102 123ms 4 Jun 2025 437th UnderKoen 🇳🇱 843 148 42ms 20 Jan 2025 438th SirBogman 🇺🇸 841 43 46ms 22 Nov 2022 438th stefangimmillaro 841 43 36ms 29 Apr 2023 438th nwellnhof 🇩🇪 841 43 38ms 24 Jun 2023 441st rak1507 🇬🇧 841 62 29ms 22 Nov 2022 441st fourth-bit 841 62 33ms 7 Dec 2022 441st SniperSmiley 🇺🇸 841 62 34ms 10 Dec 2022 441st Fracture17 841 62 33ms 14 Apr 2023 441st quimey 841 62 33ms 23 Jun 2023 441st dranjohn 841 62 48ms 11 Sep 2023 441st RedzGoose 🇦🇺 841 62 13ms 17 Jun 2024 441st smilesformiles3 841 62 14ms 21 Jun 2025 441st snoozingnewt 🇨🇦 841 62 44ms 10 Oct 2025 450th jared-hughes 840 70 2ms 16 Mar 2023 451st neel11235813 839 59 346ms 15 Jan 2024 451st inventshah 839 59 413ms 22 Jan 2024 451st duckyluuk 🇳🇱 839 59 355ms 26 May 2024 451st CaedenHarper 🇨🇦 839 59 380ms 30 Dec 2024 451st Babafaba 839 59 375ms 7 Nov 2025 456th Shanethegamer 🇺🇸 839 100 1,331ms 17 Feb 2023 457th GolfingSuccess 🇬🇷 839 167 487ms 12 days ago 458th thisishowmymindworks 🇳🇴 837 59 10ms 2 Jul 2024 458th Yax42 🇫🇷 837 59 10ms 16 Aug 2025 460th Shanethegamer 🇺🇸 835 88 320ms 24 Nov 2022 460th Steffan153 🇫🇮 835 88 311ms 24 Nov 2022 462nd lynn 835 103 117ms 6 Nov 2025 463rd SirBogman 🇺🇸 834 46 860ms 21 Nov 2022 463rd GrayJoKing 🇦🇺 834 46 1,029ms 21 Nov 2022 463rd MeWhenI 🇻🇦 834 46 967ms 24 Nov 2022 463rd pardouin 🇫🇷 834 46 908ms 12 Sep 2025 467th blaztoma 🇱🇹 834 90 394ms 16 Aug 2025 468th DialFrost 🇸🇬 834 168 540ms 6 Mar 2025 468th emgordon154 834 168 499ms 4 Oct 2025 470th AlephSquirrel 833 24 136ms 28 Apr 2023 471st GolfingSuccess 🇬🇷 833 52 39ms 13 Aug 2024 472nd DialFrost 🇸🇬 833 59 98ms 2 Jul 2025 473rd Shanethegamer 🇺🇸 833 79 81ms 22 Nov 2022 474th dvargas46 🇺🇸 831 45 7ms 21 Nov 2022 475th stefangimmillaro 831 78 101ms 15 Sep 2023 476th Kacarott 🇦🇺 830 56 62ms 9 days ago 476th GrayJoKing 🇦🇺 830 56 61ms 8 days ago 478th ovs-code 🇩🇪 829 39 3ms 20 Nov 2022 478th GrayJoKing 🇦🇺 829 39 3ms 21 Nov 2022 478th nwellnhof 🇩🇪 829 39 3ms 15 Jul 2023 First Prev 401–480 of 1,628 Next Last