The Calendar hole will go live in approximately 39 hours. Why not try and solve it ahead of time?
Day of Week 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 GrayJoKing 🇦🇺 862 80 202ms 12 Aug 2024 642nd 2bular 862 81 41ms 18 Oct 2025 643rd primo-ppcg 🇹🇭 862 94 2,879ms 21 Apr 2023 643rd saito-ta 🇯🇵 862 94 542ms 24 Apr 2023 645th stefangimmillaro 860 69 383ms 13 Oct 2024 646th HumanEquivalentUnit 860 70 15ms 28 Nov 2023 647th guilhem-roy 🇫🇷 860 95 20ms 20 Jun 2023 647th jamopher 860 95 23ms 6 Nov 2023 649th jacobly0 🇺🇸 860 99 2ms 2 Oct 2023 649th kkoenig 860 99 2ms 28 Dec 2023 651st kaascevich 859 145 642ms 22 Jul 2025 651st JayXon 🇺🇸 859 145 702ms 23 Jul 2025 653rd Steffan153 🇫🇮 858 131 7ms 20 Aug 2023 653rd edsrzf 🇳🇿 858 131 6ms 5 Dec 2024 653rd primo-ppcg 🇹🇭 858 131 7ms 27 Jan 2025 653rd kg583 🇺🇸 858 131 7ms 26 Sep 2025 653rd sean-niemann 🇺🇸 858 131 7ms 27 Sep 2025 658th primo-ppcg 🇹🇭 857 112 4ms 19 Apr 2023 658th saito-ta 🇯🇵 857 112 3ms 20 Apr 2023 660th ovs-code 🇩🇪 857 143 448ms 14 Jul 2023 661st erikgaal 855 51 6ms 5 Jan 2024 662nd edsrzf 🇳🇿 855 87 16ms 17 Oct 2025 662nd kg583 🇺🇸 855 87 16ms 2 Nov 2025 664th AlephSquirrel 855 89 74ms 17 Apr 2023 664th GolfingSuccess 🇬🇷 855 89 76ms 26 Nov 2023 664th tobeannouncd 855 89 179ms 11 Jan 2024 664th ovs-code 🇩🇪 855 89 177ms 22 May 2024 664th lynn 855 89 178ms 8 Jan 2025 664th Natanaelel 🇸🇪 855 89 166ms 8 Jun 2025 670th 386asm 🇺🇸 855 102 45ms 2 May 2023 671st Steffan153 🇫🇮 855 103 58ms 23 Apr 2023 671st m-tkach 🇺🇦 855 103 58ms 23 Apr 2023 671st Lydxn 🇨🇦 855 103 61ms 26 May 2023 671st sean-niemann 🇺🇸 855 103 62ms 2 Nov 2023 671st DialFrost 🇸🇬 855 103 59ms 23 Dec 2024 676th dokutan 855 112 142ms 11 Nov 2025 677th pardouin 🇫🇷 854 86 470ms 24 Sep 2025 677th kmathis22 854 86 445ms 22 days ago 679th Cube14yt 853 79 48ms 19 Nov 2025 680th Intevel 🇩🇪 853 125 265ms 4 Jul 2023 680th xnacly 🇩🇪 853 125 266ms 4 Jul 2023 680th msbranicky 853 125 273ms 31 Aug 2023 683rd postie77 852 69 374ms 17 Apr 2023 683rd janbehrens 🇩🇪 852 69 391ms 15 May 2023 683rd arctouch-cristiannevianna 852 69 381ms 18 May 2023 683rd jwonagel 852 69 384ms 29 Sep 2023 683rd apocriva 852 69 380ms 24 Nov 2023 683rd markcahigyan 🇭🇺 852 69 374ms 7 Feb 2024 683rd sultan 852 69 373ms 28 Feb 2024 683rd Matto58 852 69 349ms 8 Nov 2024 683rd TRexOnGit 852 69 387ms 28 Nov 2024 683rd SpareManiKatti 852 69 343ms 7 Apr 2025 693rd Yewzir 🇧🇪 852 81 206ms 3 Aug 2024 694th ovs-code 🇩🇪 852 82 34ms 18 Oct 2025 695th dokutan 851 96 14ms 16 Apr 2023 695th Poehavshi 851 96 13ms 26 Jun 2023 695th kurkale6ka 851 96 14ms 19 Nov 2023 695th chartung17 851 96 14ms 17 Dec 2023 695th jbjd 851 96 14ms 19 Feb 2024 695th msrawsonwork 851 96 13ms 1 Mar 2024 695th Grrisly 851 96 13ms 25 Mar 2024 695th yuchuehw 851 96 14ms 13 May 2024 703rd Shanethegamer 🇺🇸 851 132 6ms 20 Aug 2023 704th snoozingnewt 🇨🇦 851 144 405ms 15 days ago 705th MeWhenI 🇻🇦 850 52 1,065ms 17 Apr 2023 706th DialFrost 🇸🇬 848 57 19ms 28 Feb 2025 707th ovs-code 🇩🇪 847 97 3ms 16 Jun 2025 708th GrayJoKing 🇦🇺 847 103 43ms 19 Apr 2023 709th rucin93 🇵🇱 846 159 5ms 21 Apr 2025 710th MeWhenI 🇻🇦 844 46 4ms 12 Aug 2024 711th MeWhenI 🇻🇦 843 102 9ms 6 Mar 2024 712th Murphy4444 842 19 227ms 26 days ago 713th grospolina 842 80 52ms 2 Oct 2024 714th juliusgeo 842 97 21ms 19 Apr 2023 714th Just4FunCoder 842 97 13ms 27 Oct 2023 716th MeWhenI 🇻🇦 839 53 9ms 28 Sep 2024 717th stefangimmillaro 839 64 3,121ms 31 Oct 2024 717th emgordon154 839 64 2,877ms 30 Jan 2025 719th edsrzf 🇳🇿 839 105 63ms 2 May 2025 720th antimon2 🇯🇵 839 144 361ms 29 Oct 2024 First Prev 641–720 of 1,443 Next Last