The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
φ 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 640th TheRealOhead 🇺🇸 775 62 9ms 30 Mar 2023 640th gigaprofisi 🇺🇸 775 62 9ms 1 Sep 2025 643rd DialFrost 🇸🇬 774 107 731ms 1 Apr 2025 644th BREMAUCY 🇫🇷 773 44 213ms 23 Mar 2024 644th janlelis 773 44 45ms 23 Sep 2024 644th DialFrost 🇸🇬 773 44 233ms 26 Dec 2024 647th DialFrost 🇸🇬 773 136 68ms 15 days ago 648th FlorianCassayre 🇫🇷 768 139 281ms 19 Jul 2025 649th stassats 767 65 22ms 28 Apr 2018 649th jslip 767 65 35ms 5 Sep 2018 649th GrayJoKing 🇦🇺 767 65 13ms 17 Dec 2020 649th BBoehm 🇩🇪 767 65 13ms 25 Feb 2021 653rd Sp3000 🇦🇺 766 38 10ms 28 May 2021 654th stefangimmillaro 765 65 3,168ms 14 Nov 2024 655th stefangimmillaro 765 187 153ms 6 Nov 2023 656th lynn 764 61 16ms 15 Nov 2021 657th SirBogman 🇺🇸 762 133 47ms 3 Jun 2025 658th CatsAreFluffy 760 68 10ms 19 Feb 2023 658th cros107 🇦🇺 760 68 9ms 5 Sep 2025 658th CommandLeo 🇮🇹 760 68 108ms 24 Nov 2025 661st emgordon154 758 97 482ms 27 May 2025 662nd rucin93 🇵🇱 757 116 102ms 28 Mar 2025 663rd snoozingnewt 🇨🇦 756 45 91ms 16 Oct 2025 663rd anter69 🇭🇺 756 45 81ms 15 days ago 665th pardouin 🇫🇷 756 66 14ms 21 Mar 2025 666th sean-niemann 🇺🇸 756 159 48ms 25 May 2023 667th MeWhenI 🇻🇦 755 50 95ms 1 Nov 2023 668th SirBogman 🇺🇸 754 59 334ms 9 Jun 2020 669th primo-ppcg 🇹🇭 752 163 1,827ms 3 Feb 2022 670th DayDun 🇸🇪 751 64 11ms 24 Jan 2023 670th jbt 751 64 9ms 24 Dec 2023 672nd j-Ewan 751 142 352ms 14 Mar 2022 672nd jerrandolph 751 142 320ms 23 Dec 2023 674th MeWhenI 🇻🇦 749 62 162ms 3 Aug 2024 675th Shanethegamer 🇺🇸 749 69 9ms 27 Jun 2022 675th elgan65536 749 69 70ms 18 Nov 2023 677th primo-ppcg 🇹🇭 746 71 898ms 25 Nov 2021 678th ovs-code 🇩🇪 742 67 3,573ms 30 Nov 2024 679th edsrzf 🇳🇿 740 51 61ms 9 days ago 680th primo-ppcg 🇹🇭 740 63 112ms 30 Jan 2022 681st Natanaelel 🇸🇪 739 46 34ms 28 Dec 2022 681st Yewzir 🇧🇪 739 46 85ms 19 Feb 2024 681st Lv0Sys 🇵🇱 739 46 84ms 8 Jun 2025 684th zbreit 🇺🇸 739 70 12ms 17 Aug 2021 684th thehylian 739 70 12ms 30 Dec 2022 684th NDR0216 🇹🇼 739 70 11ms 17 Feb 2023 684th fourth-bit 739 70 12ms 9 Jul 2023 684th plcc0 739 70 13ms 24 Mar 2025 684th cefqrn 739 70 11ms 13 Apr 2025 684th dirckvdende 739 70 12ms 27 Jul 2025 684th InigoK 🇺🇸 739 70 14ms 29 Aug 2025 692nd stefangimmillaro 739 96 122ms 18 Oct 2023 693rd CatsAreFluffy 736 68 406ms 15 Jan 2024 694th anter69 🇭🇺 736 72 767ms 15 days ago 695th CaedenHarper 🇨🇦 736 112 437ms 24 Sep 2025 695th dokutan 736 112 451ms 7 Nov 2025 697th stefangimmillaro 734 138 52ms 26 Apr 2025 698th jared-hughes 730 144 67ms 9 Mar 2024 699th zakariamouhid 728 66 11ms 18 May 2023 699th FlorianCassayre 🇫🇷 728 66 62ms 4 Jun 2024 699th helbling 🇨🇭 728 66 9ms 9 Sep 2024 702nd sstadick 728 71 23ms 20 Feb 2018 702nd biotinker 728 71 24ms 20 Feb 2018 702nd gregadoff 728 71 23ms 20 Feb 2018 702nd tcoard 728 71 23ms 20 Feb 2018 702nd bkshrader 728 71 24ms 30 Dec 2018 702nd GolfingSuccess 🇬🇷 728 71 23ms 27 May 2019 702nd michelebastione 🇮🇹 728 71 23ms 30 Jun 2019 702nd thisishowmymindworks 🇳🇴 728 71 9ms 17 Oct 2020 702nd LlamaLad7 🇬🇧 728 71 23ms 17 Jan 2021 702nd georgehulme 728 71 24ms 27 Jan 2022 702nd LeeCamp 728 71 23ms 15 Feb 2022 702nd andre-de-lorde 728 71 24ms 7 Jun 2022 702nd cbondurant 728 71 12ms 6 Jul 2022 702nd dokutan 728 71 23ms 1 Jun 2024 702nd Bulmenisaurus 728 71 22ms 19 Jun 2024 717th HPWiz 🇳🇿 728 73 111ms 20 Nov 2023 718th pardouin 🇫🇷 726 163 2,289ms 28 Mar 2025 719th Shanethegamer 🇺🇸 725 69 419ms 16 Jan 2024 720th GolfingSuccess 🇬🇷 725 812 641ms 10 Aug 2022 First Prev 641–720 of 2,435 Next Last