The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
τ in all languages in chars. 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 720th goodwyna21 557 107 10ms 27 Jan 2025 722nd Yewzir 🇧🇪 554 261 6ms 19 Dec 2024 723rd Soyo-Wind 553 177 401ms 6 Nov 2025 724th ShiraJoseph 🇺🇸 551 108 10ms 6 Feb 2023 725th Shanethegamer 🇺🇸 550 70 172ms 2 Jun 2022 726th KatieLG 🇬🇧 549 98 503ms 28 Oct 2024 727th dokutan 548 240 209ms 1 Jul 2025 728th MeWhenI 🇻🇦 547 144 782ms 21 Dec 2022 729th MeWhenI 🇻🇦 543 231 139ms 6 Aug 2023 730th elgan65536 542 255 121ms 11 Nov 2023 731st albanian-laundromat 540 206 2ms 25 Jun 2025 732nd dokutan 535 208 2ms 27 Mar 2024 733rd ndren 534 71 240ms 20 days ago 734th cure-honey 🇯🇵 534 259 140ms 7 Jul 2021 735th cros107 🇦🇺 533 106 1,597ms 5 Sep 2025 736th m-tkach 🇺🇦 533 209 2ms 26 Oct 2022 737th dcgjb 528 95 356ms 13 May 2024 738th jmerle 🇳🇱 528 107 15ms 6 Jul 2023 739th arrudagates 527 113 10ms 24 Jun 2021 740th MeWhenI 🇻🇦 524 264 152ms 12 Dec 2022 741st Lv0Sys 🇵🇱 522 114 15ms 29 Nov 2025 742nd yokasuretsu 521 74 143ms 30 Jun 2018 743rd marcin7Cd 521 128 25ms 21 Mar 2021 744th NickTheEASDude 🇺🇸 518 109 841ms 20 Aug 2024 745th Yewzir 🇧🇪 515 216 2ms 18 Jan 2024 746th jiaminglimjm 🇲🇾 514 110 14ms 27 Nov 2019 747th 2bular 513 113 1,692ms 17 Apr 2024 748th Ephellon 513 116 11ms 2 Dec 2022 749th dokutan 511 220 2ms 3 Apr 2024 750th neihousaigaai 509 111 2,559ms 7 May 2021 750th dokutan 509 111 14ms 28 Mar 2025 752nd nwellnhof 🇩🇪 508 667 20ms 19 Nov 2022 753rd GalladeGuy 🇺🇸 506 198 5ms 25 May 2020 754th dokutan 506 215 107ms 28 Mar 2024 755th MeWhenI 🇻🇦 506 220 51ms 26 Aug 2023 756th wh3n3v3r 🇨🇿 504 112 21ms 20 Nov 2024 757th Yewzir 🇧🇪 504 234 54ms 23 Dec 2023 758th snoozingnewt 🇨🇦 503 107 404ms 28 Sep 2025 759th inventshah 503 673 18ms 18 Nov 2022 760th inverseLorentz 🇦🇺 500 113 2,294ms 22 Feb 2024 760th cuboids 500 113 129ms 17 Jul 2024 762nd dokutan 500 234 462ms 24 Sep 2025 763rd Natanaelel 🇸🇪 498 54 48ms 25 Jul 2022 764th commandblockguy 🇺🇸 498 108 689ms 1 Sep 2025 765th Herbert00709 🇵🇱 498 140 3,608ms 24 Oct 2024 766th cbrt-x 498 235 414ms 14 Oct 2021 767th aksyristos 496 236 406ms 17 Feb 2023 768th JunkIce 495 114 14ms 24 Nov 2024 769th galloj 🇨🇿 494 685 89ms 1 Mar 2023 770th fgrosshans 🇫🇷 491 115 12ms 8 May 2023 771st dokutan 490 241 401ms 20 Aug 2024 772nd KatieLG 🇬🇧 489 200 443ms 27 Oct 2022 773rd janbehrens 🇩🇪 488 240 445ms 25 Apr 2023 774th MeWhenI 🇻🇦 488 309 1,827ms 7 Nov 2025 775th dokutan 485 111 364ms 28 Mar 2025 776th frobinsonj 484 123 35ms 6 Dec 2019 777th xy3 🇮🇪 479 118 18ms 18 Nov 2021 778th Yewzir 🇧🇪 477 228 102ms 6 Jul 2023 779th neihousaigaai 476 246 493ms 11 May 2021 780th falsidge 475 119 117ms 17 Jun 2023 781st hajimehoshi 🇯🇵 474 302 291ms 16 Apr 2020 782nd alexsave 473 126 10ms 2 days ago 783rd JunkIce 472 114 345ms 3 Dec 2024 784th galloj 🇨🇿 471 120 10ms 25 Jan 2021 784th befoster 471 120 22ms 10 Apr 2021 784th guilhem-roy 🇫🇷 471 120 15ms 9 Mar 2022 784th za3k 471 120 2,338ms 28 Oct 2022 784th keelimeguy 🇺🇸 471 120 15ms 16 Dec 2023 789th mousetail 🇳🇱 470 74 546ms 14 Mar 2025 790th h3ra993huskp 🇯🇵 463 253 482ms 27 days ago 791st PatrickStephansen 🇿🇦 462 129 302ms 23 Apr 2021 791st Ultra814 462 129 22ms 25 Aug 2025 793rd heanyang1 460 218 37ms 14 Mar 2025 794th adamnielson42 🇺🇸 459 123 43ms 31 Mar 2023 794th driri85 459 123 30ms 7 Jan 2025 796th Mr-McChicken 456 124 21ms 16 Oct 2023 797th janbehrens 🇩🇪 453 162 3,625ms 22 Jun 2023 798th Yewzir 🇧🇪 452 222 2ms 23 Dec 2023 799th yzhs 🇩🇪 449 145 2,527ms 27 Jul 2021 800th fynnkroeger 448 126 429ms 22 Jan 2021 First Prev 721–800 of 2,248 Next Last