The Calendar hole will go live in approximately 13 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 namelessiw 836 72 400ms 5 Mar 2024 402nd SirBogman 🇺🇸 836 120 12ms 7 Jul 2023 403rd jslip 834 59 14ms 25 May 2022 403rd ovs-code 🇩🇪 834 59 18ms 11 Mar 2023 403rd Steffan153 🇫🇮 834 59 15ms 12 Mar 2023 403rd xsot 🇸🇬 834 59 11ms 6 Oct 2024 407th fuzzylojik-golf 🇺🇸 833 145 665ms 24 Sep 2025 407th DialFrost 🇸🇬 833 145 550ms 25 Sep 2025 409th marcin7Cd 832 76 15ms 4 Feb 2021 409th namelessiw 832 76 18ms 3 Dec 2023 409th andrewjc2000 832 76 13ms 21 Mar 2025 409th solisolu 832 76 25ms 16 Nov 2025 409th YAJUE114514 832 76 11ms 7 days ago 414th jared-hughes 832 142 95ms 7 Feb 2023 415th emplv 🇱🇻 831 114 108ms 2 Jan 2023 416th ovs-code 🇩🇪 831 118 2,681ms 16 Aug 2023 417th primo-ppcg 🇹🇭 830 49 78ms 5 Oct 2020 417th ovs-code 🇩🇪 830 49 85ms 22 Oct 2023 419th namelessiw 830 120 414ms 22 Jul 2025 420th Andriamanitra 🇫🇮 829 47 247ms 23 Sep 2022 420th neel11235813 829 47 271ms 14 Feb 2023 420th voytxt 🇨🇿 829 47 2,391ms 22 May 2023 420th Lv0Sys 🇵🇱 829 47 189ms 19 days ago 424th GrayJoKing 🇦🇺 829 143 68ms 2 Feb 2024 425th emgordon154 829 182 1,903ms 11 hours ago 426th Herbert00709 🇵🇱 827 39 99ms 5 May 2024 427th DialFrost 🇸🇬 825 73 458ms 15 Jan 2024 428th Shanethegamer 🇺🇸 824 115 115ms 14 Oct 2022 429th Steffan153 🇫🇮 823 74 98ms 10 Feb 2024 430th nwellnhof 🇩🇪 823 122 10ms 5 May 2020 430th sean-niemann 🇺🇸 823 122 23ms 25 Jun 2025 430th jared-hughes 823 122 33ms 23 Sep 2025 433rd sean-niemann 🇺🇸 822 147 525ms 25 Sep 2025 434th emgordon154 821 72 126ms 15 Nov 2024 435th LogicalJoe 821 77 18ms 10 Nov 2022 435th stefangimmillaro 821 77 10ms 19 Dec 2022 435th snydej 821 77 12ms 3 Dec 2024 435th moustave 821 77 10ms 14 Mar 2025 435th jatloe 821 77 10ms 17 Mar 2025 440th jared-hughes 821 122 333ms 6 Feb 2023 441st SirBogman 🇺🇸 820 144 78ms 27 May 2023 442nd AlephSquirrel 817 73 10ms 10 Feb 2023 442nd KingSkyrock 🇺🇸 817 73 10ms 14 Oct 2024 444th stefangimmillaro 817 122 405ms 1 Aug 2023 444th CaedenHarper 🇨🇦 817 122 389ms 21 Oct 2025 446th SirBogman 🇺🇸 816 55 1,522ms 26 Oct 2021 447th rhdqor213 816 123 21ms 27 Jun 2024 448th DialFrost 🇸🇬 815 94 76ms 23 Mar 2025 449th nwellnhof 🇩🇪 813 50 80ms 1 May 2020 450th nwellnhof 🇩🇪 811 62 294ms 1 Nov 2021 450th SirBogman 🇺🇸 811 62 360ms 11 Aug 2023 452nd RaBa21 🇭🇺 810 78 12ms 19 Jul 2025 452nd snoozingnewt 🇨🇦 810 78 11ms 27 days ago 454th MeWhenI 🇻🇦 810 117 106ms 15 Oct 2022 455th rifatx 810 123 423ms 14 Jul 2024 456th GrayJoKing 🇦🇺 809 124 29ms 19 Jun 2024 456th ovs-code 🇩🇪 809 124 14ms 9 days ago 458th MeWhenI 🇻🇦 809 178 273ms 9 Feb 2023 459th billings7 🇬🇧 804 124 405ms 21 Nov 2021 459th annaproxy 804 124 408ms 20 Aug 2022 461st saito-ta 🇯🇵 803 118 4,987ms 8 Nov 2023 462nd Herbert00709 🇵🇱 803 125 13ms 25 Jan 2025 463rd MeWhenI 🇻🇦 801 87 1,300ms 8 Jun 2023 464th m-tkach 🇺🇦 801 202 118ms 17 Dec 2023 465th nstearns96 🇬🇧 800 79 46ms 23 Oct 2024 466th MeWhenI 🇻🇦 798 51 91ms 8 Aug 2023 467th ovs-code 🇩🇪 798 96 1,118ms 3 Feb 2023 468th Steffan153 🇫🇮 797 85 73ms 18 Feb 2024 469th ovs-code 🇩🇪 797 154 462ms 29 Mar 2025 470th somebody1234 795 49 202ms 11 Dec 2018 471st janbehrens 🇩🇪 795 75 10ms 5 Oct 2020 472nd geofft 790 80 11ms 13 Dec 2020 472nd betaveros 790 80 12ms 1 Jan 2023 472nd albanian-laundromat 790 80 14ms 12 Jul 2025 475th targrik 790 111 3,410ms 4 Jan 2025 476th jared-hughes 789 120 4,198ms 18 Sep 2024 477th voytxt 🇨🇿 788 75 145ms 3 Aug 2024 478th kg583 🇺🇸 787 86 56ms 25 days ago 479th annaproxy 786 83 126ms 8 Aug 2022 480th thisishowmymindworks 🇳🇴 784 76 13ms 25 Aug 2020 First Prev 401–480 of 2,284 Next Last