The Calendar hole will go live in approximately 10 days. 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 saito-ta 🇯🇵 862 94 567ms 24 Apr 2023 642nd stefangimmillaro 860 69 383ms 13 Oct 2024 643rd HumanEquivalentUnit 860 70 15ms 28 Nov 2023 644th guilhem-roy 🇫🇷 860 95 20ms 20 Jun 2023 644th jamopher 860 95 23ms 6 Nov 2023 646th jacobly0 🇺🇸 860 99 2ms 2 Oct 2023 646th kkoenig 860 99 2ms 28 Dec 2023 648th kaascevich 859 145 642ms 22 Jul 2025 648th JayXon 🇺🇸 859 145 702ms 23 Jul 2025 650th Steffan153 🇫🇮 858 131 7ms 20 Aug 2023 650th edsrzf 🇳🇿 858 131 6ms 5 Dec 2024 650th primo-ppcg 🇹🇭 858 131 7ms 27 Jan 2025 650th kg583 🇺🇸 858 131 7ms 26 Sep 2025 650th sean-niemann 🇺🇸 858 131 7ms 27 Sep 2025 655th primo-ppcg 🇹🇭 857 112 4ms 19 Apr 2023 655th saito-ta 🇯🇵 857 112 3ms 20 Apr 2023 657th ovs-code 🇩🇪 857 143 448ms 14 Jul 2023 658th erikgaal 855 51 7ms 5 Jan 2024 659th edsrzf 🇳🇿 855 87 16ms 17 Oct 2025 659th kg583 🇺🇸 855 87 16ms 2 Nov 2025 661st AlephSquirrel 855 89 108ms 17 Apr 2023 661st GolfingSuccess 🇬🇷 855 89 89ms 26 Nov 2023 661st tobeannouncd 855 89 179ms 11 Jan 2024 661st ovs-code 🇩🇪 855 89 177ms 22 May 2024 661st lynn 855 89 178ms 8 Jan 2025 661st Natanaelel 🇸🇪 855 89 166ms 8 Jun 2025 667th 386asm 🇺🇸 855 102 45ms 2 May 2023 668th Steffan153 🇫🇮 855 103 58ms 23 Apr 2023 668th m-tkach 🇺🇦 855 103 58ms 23 Apr 2023 668th Lydxn 🇨🇦 855 103 61ms 26 May 2023 668th sean-niemann 🇺🇸 855 103 62ms 2 Nov 2023 668th DialFrost 🇸🇬 855 103 59ms 23 Dec 2024 673rd dokutan 855 112 142ms 11 Nov 2025 674th pardouin 🇫🇷 854 86 470ms 24 Sep 2025 674th kmathis22 854 86 499ms 14 days ago 676th Cube14yt 853 79 48ms 19 Nov 2025 677th Intevel 🇩🇪 853 125 265ms 4 Jul 2023 677th xnacly 🇩🇪 853 125 266ms 4 Jul 2023 677th msbranicky 853 125 273ms 31 Aug 2023 680th Yewzir 🇧🇪 852 81 206ms 3 Aug 2024 681st ovs-code 🇩🇪 852 82 34ms 18 Oct 2025 682nd postie77 851 69 374ms 17 Apr 2023 682nd janbehrens 🇩🇪 851 69 391ms 15 May 2023 682nd arctouch-cristiannevianna 851 69 381ms 18 May 2023 682nd jwonagel 851 69 384ms 29 Sep 2023 682nd apocriva 851 69 380ms 24 Nov 2023 682nd markcahigyan 🇭🇺 851 69 374ms 7 Feb 2024 682nd sultan 851 69 373ms 28 Feb 2024 682nd Matto58 851 69 361ms 8 Nov 2024 682nd TRexOnGit 851 69 393ms 28 Nov 2024 682nd SpareManiKatti 851 69 343ms 7 Apr 2025 692nd dokutan 851 96 14ms 16 Apr 2023 692nd Poehavshi 851 96 13ms 26 Jun 2023 692nd kurkale6ka 851 96 14ms 19 Nov 2023 692nd chartung17 851 96 14ms 17 Dec 2023 692nd jbjd 851 96 14ms 19 Feb 2024 692nd msrawsonwork 851 96 13ms 1 Mar 2024 692nd Grrisly 851 96 13ms 25 Mar 2024 692nd yuchuehw 851 96 14ms 13 May 2024 700th Shanethegamer 🇺🇸 851 132 6ms 20 Aug 2023 701st snoozingnewt 🇨🇦 851 144 405ms 6 days ago 702nd MeWhenI 🇻🇦 850 52 1,065ms 17 Apr 2023 703rd DialFrost 🇸🇬 848 57 19ms 28 Feb 2025 704th ovs-code 🇩🇪 847 97 3ms 16 Jun 2025 705th GrayJoKing 🇦🇺 847 103 43ms 19 Apr 2023 706th rucin93 🇵🇱 846 159 5ms 21 Apr 2025 707th MeWhenI 🇻🇦 844 46 4ms 12 Aug 2024 708th MeWhenI 🇻🇦 843 102 9ms 6 Mar 2024 709th Murphy4444 842 19 227ms 17 days ago 710th grospolina 842 80 52ms 2 Oct 2024 711th juliusgeo 842 97 21ms 19 Apr 2023 711th Just4FunCoder 842 97 13ms 27 Oct 2023 713th MeWhenI 🇻🇦 839 53 9ms 28 Sep 2024 714th stefangimmillaro 839 64 4,549ms 31 Oct 2024 714th emgordon154 839 64 4,240ms 30 Jan 2025 716th edsrzf 🇳🇿 839 105 63ms 2 May 2025 717th antimon2 🇯🇵 839 144 394ms 29 Oct 2024 718th acotis 839 229 216ms 6 days ago 719th neel11235813 837 89 404ms 28 Mar 2024 720th CLOStrophobic 🇮🇹 836 89 8ms 6 May 2025 First Prev 641–720 of 1,437 Next Last