The Calendar hole will go live in approximately 13 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 560th doge1338 834 128 343ms 20 Mar 2021 560th emplv 🇱🇻 834 128 284ms 20 Dec 2022 563rd ovs-code 🇩🇪 834 142 508ms 29 Mar 2025 564th primo-ppcg 🇹🇭 831 157 274ms 16 Jan 2021 565th sean-niemann 🇺🇸 830 110 658ms 15 Jul 2025 566th DialFrost 🇸🇬 829 56 151ms 3 Aug 2024 567th inventshah 829 58 10ms 27 May 2021 567th emgordon154 829 58 9ms 30 Nov 2021 567th daniel-pedersen 🇸🇪 829 58 9ms 6 Mar 2022 567th DialFrost 🇸🇬 829 58 24ms 29 Jul 2024 571st flawr 827 69 124ms 2 Jan 2019 572nd DialFrost 🇸🇬 827 89 552ms 29 Jul 2024 573rd cduerm 827 129 275ms 12 May 2020 574th o0lit3 🇺🇸 821 28 41ms 29 Sep 2021 574th tidalDisruptionEvent 🇨🇦 821 28 40ms 10 Mar 2023 574th CatsAreFluffy 821 28 61ms 6 Jan 2024 577th jhu04 821 63 9ms 24 Sep 2022 577th Command-Master 821 63 9ms 23 Sep 2023 579th billings7 🇬🇧 821 110 395ms 21 Nov 2021 579th Yewzir 🇧🇪 821 110 430ms 6 Jun 2024 581st MeWhenI 🇻🇦 821 130 274ms 9 Feb 2023 582nd commandblockguy 🇺🇸 820 61 415ms 15 Jan 2024 583rd Steffan153 🇫🇮 817 59 5ms 12 Dec 2023 583rd dokutan 817 59 5ms 31 Dec 2023 583rd DialFrost 🇸🇬 817 59 6ms 16 Dec 2024 583rd kg583 🇺🇸 817 59 5ms 15 Sep 2025 587th SirBogman 🇺🇸 817 72 1,283ms 4 Jan 2022 588th MeWhenI 🇻🇦 816 101 1,516ms 7 Nov 2025 588th edsrzf 🇳🇿 816 101 543ms 17 Nov 2025 590th annaproxy 815 44 2,477ms 28 Jan 2022 591st piano-miles 815 59 15ms 19 Feb 2023 591st CatsAreFluffy 815 59 10ms 19 Feb 2023 593rd namelessiw 814 111 377ms 21 Jul 2025 594th DialFrost 🇸🇬 810 125 51ms 7 May 2025 595th LucasBertocchini 808 64 9ms 11 Dec 2020 595th MaxElf999 808 64 10ms 15 Feb 2024 595th KasperKivimaeki 🇫🇮 808 64 75ms 16 Jul 2025 598th DialFrost 🇸🇬 808 102 537ms 26 Sep 2025 598th stefangimmillaro 808 102 565ms 6 Oct 2025 600th elgan65536 808 132 283ms 18 Nov 2023 601st namelessiw 807 62 420ms 5 Mar 2024 602nd SirBogman 🇺🇸 807 112 446ms 21 Nov 2021 603rd ovs-code 🇩🇪 805 62 5ms 11 Mar 2023 604th ovs-code 🇩🇪 804 60 381ms 10 Dec 2023 605th DialFrost 🇸🇬 803 66 925ms 23 Aug 2024 606th cywong-amino 🇭🇰 801 60 37ms 2 Jul 2020 606th didion0 🇺🇸 801 60 10ms 9 Feb 2022 606th dmrichwa 🇺🇸 801 60 15ms 15 Jun 2022 609th annaproxy 799 113 470ms 5 Apr 2022 609th CaedenHarper 🇨🇦 799 113 923ms 19 Oct 2025 611th MeWhenI 🇻🇦 797 89 125ms 15 Oct 2022 612th bwenstar 795 65 10ms 9 Aug 2022 612th nstearns96 🇬🇧 795 65 10ms 15 Sep 2023 612th GeorgeStechman 🇬🇧 795 65 44ms 6 Jan 2024 615th prplz 🇦🇺 794 56 553ms 25 Jun 2020 616th namelessiw 793 104 449ms 7 Oct 2025 617th roguh 🇬🇹 792 63 5ms 26 Jan 2024 618th MeWhenI 🇻🇦 791 43 44ms 29 Dec 2024 619th primo-ppcg 🇹🇭 790 133 73ms 7 days ago 620th DialFrost 🇸🇬 790 161 1,713ms 15 Sep 2025 621st primo-ppcg 🇹🇭 787 37 38ms 6 Dec 2020 622nd ovs-code 🇩🇪 787 59 235ms 3 Aug 2024 622nd emgordon154 787 59 123ms 10 Aug 2024 624th Yax42 🇫🇷 786 115 421ms 25 Dec 2024 625th duckyluuk 🇳🇱 785 105 420ms 25 Sep 2025 626th SirBogman 🇺🇸 784 134 63ms 25 May 2023 627th petar-donchev 783 66 76ms 3 Sep 2019 627th za3k 783 66 11ms 19 Oct 2022 627th qpwoeirut 783 66 12ms 14 Aug 2025 630th lifthrasiir 🇰🇷 783 316 1,507ms 15 Dec 2024 631st jared-hughes 782 73 123ms 15 Sep 2023 632nd MeWhenI 🇻🇦 781 57 342ms 14 Jul 2024 633rd ovs-code 🇩🇪 780 91 172ms 9 Jul 2024 633rd DialFrost 🇸🇬 780 91 142ms 23 Mar 2025 635th MeWhenI 🇻🇦 779 68 961ms 12 May 2023 636th KasperKivimaeki 🇫🇮 778 135 66ms 20 Nov 2025 637th Herbert00709 🇵🇱 777 133 13ms 7 Jun 2024 638th acotis 777 184 153ms 28 Jun 2025 639th MeWhenI 🇻🇦 776 39 46ms 13 Jul 2024 640th itsh01 775 62 53ms 14 Sep 2022 First Prev 561–640 of 2,440 Next Last