The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
τ 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 jslip 834 59 14ms 25 May 2022 401st ovs-code 🇩🇪 834 59 18ms 11 Mar 2023 401st Steffan153 🇫🇮 834 59 15ms 12 Mar 2023 401st xsot 🇸🇬 834 59 11ms 6 Oct 2024 405th fuzzylojik-golf 🇺🇸 833 145 665ms 24 Sep 2025 405th DialFrost 🇸🇬 833 145 550ms 25 Sep 2025 407th marcin7Cd 832 76 15ms 4 Feb 2021 407th namelessiw 832 76 18ms 3 Dec 2023 407th andrewjc2000 832 76 13ms 21 Mar 2025 407th solisolu 832 76 25ms 16 Nov 2025 407th YAJUE114514 832 76 11ms 12 days ago 412th jared-hughes 832 142 95ms 7 Feb 2023 413th emplv 🇱🇻 831 114 108ms 2 Jan 2023 414th ovs-code 🇩🇪 831 118 2,681ms 16 Aug 2023 415th namelessiw 831 120 414ms 22 Jul 2025 416th primo-ppcg 🇹🇭 830 49 78ms 5 Oct 2020 416th ovs-code 🇩🇪 830 49 85ms 22 Oct 2023 418th Andriamanitra 🇫🇮 829 47 247ms 23 Sep 2022 418th neel11235813 829 47 271ms 14 Feb 2023 418th voytxt 🇨🇿 829 47 2,391ms 22 May 2023 418th Lv0Sys 🇵🇱 829 47 189ms 24 days ago 422nd GrayJoKing 🇦🇺 829 143 68ms 2 Feb 2024 423rd Herbert00709 🇵🇱 827 39 99ms 5 May 2024 424th DialFrost 🇸🇬 825 73 458ms 15 Jan 2024 425th Shanethegamer 🇺🇸 824 115 115ms 14 Oct 2022 426th Steffan153 🇫🇮 823 74 98ms 10 Feb 2024 427th nwellnhof 🇩🇪 823 122 10ms 5 May 2020 427th sean-niemann 🇺🇸 823 122 23ms 25 Jun 2025 427th jared-hughes 823 122 33ms 23 Sep 2025 430th sean-niemann 🇺🇸 822 147 525ms 25 Sep 2025 431st emgordon154 821 72 126ms 15 Nov 2024 432nd LogicalJoe 821 77 18ms 10 Nov 2022 432nd stefangimmillaro 821 77 10ms 19 Dec 2022 432nd snydej 821 77 12ms 3 Dec 2024 432nd moustave 821 77 10ms 14 Mar 2025 432nd jatloe 821 77 10ms 17 Mar 2025 437th SirBogman 🇺🇸 820 144 78ms 27 May 2023 438th AlephSquirrel 817 73 10ms 10 Feb 2023 438th KingSkyrock 🇺🇸 817 73 10ms 14 Oct 2024 440th stefangimmillaro 817 122 405ms 1 Aug 2023 440th CaedenHarper 🇨🇦 817 122 389ms 21 Oct 2025 442nd SirBogman 🇺🇸 816 55 1,186ms 26 Oct 2021 443rd rhdqor213 816 123 21ms 27 Jun 2024 444th DialFrost 🇸🇬 815 94 76ms 23 Mar 2025 445th nwellnhof 🇩🇪 813 50 80ms 1 May 2020 446th nwellnhof 🇩🇪 811 62 294ms 1 Nov 2021 446th SirBogman 🇺🇸 811 62 360ms 11 Aug 2023 448th rifatx 811 123 423ms 14 Jul 2024 449th RaBa21 🇭🇺 810 78 12ms 19 Jul 2025 449th snoozingnewt 🇨🇦 810 78 11ms 21 Nov 2025 451st MeWhenI 🇻🇦 810 117 106ms 15 Oct 2022 452nd GrayJoKing 🇦🇺 809 124 29ms 19 Jun 2024 452nd ovs-code 🇩🇪 809 124 14ms 14 days ago 454th MeWhenI 🇻🇦 809 178 273ms 9 Feb 2023 455th billings7 🇬🇧 804 124 405ms 21 Nov 2021 455th annaproxy 804 124 408ms 20 Aug 2022 457th saito-ta 🇯🇵 803 118 4,987ms 8 Nov 2023 458th Herbert00709 🇵🇱 803 125 13ms 25 Jan 2025 459th MeWhenI 🇻🇦 801 87 1,300ms 8 Jun 2023 460th m-tkach 🇺🇦 801 202 118ms 17 Dec 2023 461st nstearns96 🇬🇧 800 79 46ms 23 Oct 2024 462nd MeWhenI 🇻🇦 798 51 91ms 8 Aug 2023 463rd ovs-code 🇩🇪 798 96 1,118ms 3 Feb 2023 464th Steffan153 🇫🇮 797 85 73ms 18 Feb 2024 465th ovs-code 🇩🇪 797 154 462ms 29 Mar 2025 466th somebody1234 795 49 202ms 11 Dec 2018 467th janbehrens 🇩🇪 795 75 10ms 5 Oct 2020 468th geofft 790 80 11ms 13 Dec 2020 468th betaveros 790 80 12ms 1 Jan 2023 468th albanian-laundromat 790 80 14ms 12 Jul 2025 471st targrik 790 111 3,591ms 4 Jan 2025 472nd jared-hughes 789 120 4,198ms 18 Sep 2024 473rd voytxt 🇨🇿 788 75 145ms 3 Aug 2024 474th kg583 🇺🇸 787 86 56ms 23 Nov 2025 475th annaproxy 786 83 126ms 8 Aug 2022 476th thisishowmymindworks 🇳🇴 784 76 13ms 25 Aug 2020 476th trinityy-7 784 76 37ms 28 Jun 2024 478th sisyphus-ppcg 🇦🇺 782 52 109ms 1 Apr 2021 478th janlelis 782 52 4,963ms 4 Dec 2023 480th clockworknazo 782 98 410ms 23 Oct 2022 First Prev 401–480 of 2,283 Next Last