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 241st sean-niemann 🇺🇸 906 93 808ms 25 Jun 2025 242nd primo-ppcg 🇹🇭 905 153 138ms 5 Apr 2025 243rd Constructor7 903 70 18ms 19 Mar 2018 243rd RDShah 903 70 19ms 11 Jun 2022 243rd inventshah 903 70 19ms 11 Jun 2022 243rd bricknellj 903 70 11ms 6 Mar 2023 243rd jared-hughes 903 70 11ms 14 Sep 2023 243rd Herbert00709 🇵🇱 903 70 17ms 6 May 2024 243rd lifthrasiir 🇰🇷 903 70 12ms 7 Dec 2024 250th GrayJoKing 🇦🇺 902 54 498ms 13 Sep 2024 251st MeWhenI 🇻🇦 902 77 18ms 26 Apr 2024 252nd JayXon 🇺🇸 902 105 113ms 16 Oct 2022 253rd KasperKivimaeki 🇫🇮 902 131 95ms 27 days ago 254th Lydxn 🇨🇦 901 69 3,180ms 5 Aug 2023 255th JayXon 🇺🇸 900 121 164ms 1 May 2023 255th DialFrost 🇸🇬 900 121 173ms 24 Mar 2025 257th argusdusty 🇺🇸 900 160 283ms 26 Dec 2020 258th o0lit3 🇺🇸 899 32 34ms 6 Jan 2022 259th GrayJoKing 🇦🇺 899 67 447ms 16 Jan 2024 259th MeWhenI 🇻🇦 899 67 396ms 17 Jan 2024 259th m-tkach 🇺🇦 899 67 502ms 20 Jan 2024 259th Steffan153 🇫🇮 899 67 421ms 20 Jan 2024 259th emgordon154 899 67 431ms 12 Sep 2024 259th CaedenHarper 🇨🇦 899 67 497ms 11 Aug 2025 265th sean-niemann 🇺🇸 899 109 1,385ms 15 Jul 2025 266th nwellnhof 🇩🇪 898 50 528ms 5 Dec 2022 267th sean-niemann 🇺🇸 898 111 431ms 7 Aug 2023 267th JayXon 🇺🇸 898 111 392ms 20 Mar 2025 269th primo-ppcg 🇹🇭 898 132 74ms 21 Jun 2022 270th HPWiz 🇳🇿 898 146 2,971ms 12 Oct 2023 271st primo-ppcg 🇹🇭 898 149 278ms 20 Jan 2022 272nd Steffan153 🇫🇮 897 94 801ms 1 Sep 2024 273rd primo-ppcg 🇹🇭 897 112 58ms 26 Apr 2025 274th sean-niemann 🇺🇸 896 36 82ms 22 Jul 2022 274th emgordon154 896 36 247ms 10 Sep 2025 274th CornerMercury 🇬🇧 896 36 65ms 17 days ago 277th rucin93 🇵🇱 896 66 151ms 14 Mar 2025 277th sean-niemann 🇺🇸 896 66 136ms 28 Apr 2025 279th primo-ppcg 🇹🇭 896 112 9ms 5 Oct 2020 280th Steffan153 🇫🇮 895 112 196ms 1 Sep 2024 281st GrayJoKing 🇦🇺 895 147 659ms 2 Feb 2024 282nd primo-ppcg 🇹🇭 895 226 4,084ms 6 Jun 2021 283rd GrayJoKing 🇦🇺 893 41 15ms 20 Nov 2020 284th sean-niemann 🇺🇸 892 125 507ms 27 Mar 2025 285th GrayJoKing 🇦🇺 892 149 2,292ms 7 Feb 2024 286th Irratix 🇳🇱 890 67 20ms 2 Jun 2022 286th KrausRaus 🇺🇸 890 67 20ms 2 Jun 2022 286th pardouin 🇫🇷 890 67 12ms 27 Sep 2024 286th DialFrost 🇸🇬 890 67 14ms 31 Aug 2025 290th CedricGebistorf 890 71 113ms 6 Mar 2022 290th Irratix 🇳🇱 890 71 22ms 1 Jul 2022 290th Mukundan314 890 71 12ms 19 Sep 2025 293rd ovs-code 🇩🇪 890 96 529ms 21 Jul 2024 293rd Steffan153 🇫🇮 890 96 517ms 21 Jul 2024 295th nwellnhof 🇩🇪 890 112 394ms 21 Nov 2021 295th primo-ppcg 🇹🇭 890 112 383ms 21 Nov 2021 297th sean-niemann 🇺🇸 889 108 594ms 19 Nov 2025 298th GrayJoKing 🇦🇺 889 182 195ms 1 Feb 2024 299th primo-ppcg 🇹🇭 888 133 74ms 7 days ago 300th jared-hughes 887 282 3,676ms 22 Jul 2023 301st sean-niemann 🇺🇸 886 68 414ms 15 Jan 2024 302nd primo-ppcg 🇹🇭 886 123 588ms 10 Dec 2022 303rd sean-niemann 🇺🇸 886 151 391ms 11 Jan 2025 304th primo-ppcg 🇹🇭 886 197 39ms 12 May 2023 305th IanUtley 884 59 70ms 2 Nov 2022 306th edsrzf 🇳🇿 884 76 49ms 30 Dec 2024 307th primo-ppcg 🇹🇭 884 142 106ms 18 Sep 2023 308th DialFrost 🇸🇬 883 139 1,455ms 28 Mar 2025 309th nwellnhof 🇩🇪 883 667 20ms 19 Nov 2022 310th bitsandbeyond 🇳🇱 882 57 238ms 1 Nov 2025 311th xnor-gate 882 74 159ms 4 Jan 2022 312th MeWhenI 🇻🇦 882 113 407ms 28 Aug 2023 313th ovs-code 🇩🇪 881 150 1,733ms 12 Oct 2024 314th GrayJoKing 🇦🇺 880 87 71ms 5 Oct 2023 315th primo-ppcg 🇹🇭 878 96 1,128ms 19 Nov 2022 316th prplz 🇦🇺 877 68 12ms 4 Oct 2019 316th rambox11 877 68 13ms 2 May 2020 316th tomtheisen 🇺🇸 877 68 10ms 8 Oct 2020 316th helbling 🇨🇭 877 68 10ms 27 Jun 2025 316th CaedenHarper 🇨🇦 877 68 12ms 22 Aug 2025 First Prev 241–320 of 2,284 Next Last