The Calendar hole will go live in approximately 3 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 641st primo-ppcg 🇹🇭 862 94 2,879ms 21 Apr 2023 641st saito-ta 🇯🇵 862 94 542ms 24 Apr 2023 643rd stefangimmillaro 860 69 383ms 13 Oct 2024 644th HumanEquivalentUnit 860 70 15ms 28 Nov 2023 645th guilhem-roy 🇫🇷 860 95 20ms 20 Jun 2023 645th jamopher 860 95 23ms 6 Nov 2023 647th jacobly0 🇺🇸 860 99 2ms 2 Oct 2023 647th kkoenig 860 99 2ms 28 Dec 2023 649th kaascevich 859 145 642ms 22 Jul 2025 649th JayXon 🇺🇸 859 145 702ms 23 Jul 2025 651st Steffan153 🇫🇮 858 131 7ms 20 Aug 2023 651st edsrzf 🇳🇿 858 131 6ms 5 Dec 2024 651st primo-ppcg 🇹🇭 858 131 7ms 27 Jan 2025 651st kg583 🇺🇸 858 131 7ms 26 Sep 2025 651st sean-niemann 🇺🇸 858 131 7ms 27 Sep 2025 656th primo-ppcg 🇹🇭 857 112 4ms 19 Apr 2023 656th saito-ta 🇯🇵 857 112 3ms 20 Apr 2023 658th ovs-code 🇩🇪 857 143 448ms 14 Jul 2023 659th kumavale 856 222 213ms 113 mins ago 660th erikgaal 855 51 6ms 5 Jan 2024 661st edsrzf 🇳🇿 855 87 16ms 17 Oct 2025 661st kg583 🇺🇸 855 87 16ms 2 Nov 2025 663rd AlephSquirrel 855 89 74ms 17 Apr 2023 663rd GolfingSuccess 🇬🇷 855 89 76ms 26 Nov 2023 663rd tobeannouncd 855 89 179ms 11 Jan 2024 663rd ovs-code 🇩🇪 855 89 177ms 22 May 2024 663rd lynn 855 89 178ms 8 Jan 2025 663rd Natanaelel 🇸🇪 855 89 166ms 8 Jun 2025 669th 386asm 🇺🇸 855 102 45ms 2 May 2023 670th Steffan153 🇫🇮 855 103 58ms 23 Apr 2023 670th m-tkach 🇺🇦 855 103 58ms 23 Apr 2023 670th Lydxn 🇨🇦 855 103 61ms 26 May 2023 670th sean-niemann 🇺🇸 855 103 62ms 2 Nov 2023 670th DialFrost 🇸🇬 855 103 59ms 23 Dec 2024 675th dokutan 855 112 142ms 11 Nov 2025 676th pardouin 🇫🇷 854 86 470ms 24 Sep 2025 676th kmathis22 854 86 445ms 20 days ago 678th Cube14yt 853 79 48ms 19 Nov 2025 679th Intevel 🇩🇪 853 125 265ms 4 Jul 2023 679th xnacly 🇩🇪 853 125 266ms 4 Jul 2023 679th msbranicky 853 125 273ms 31 Aug 2023 682nd Yewzir 🇧🇪 852 81 206ms 3 Aug 2024 683rd ovs-code 🇩🇪 852 82 34ms 18 Oct 2025 684th postie77 851 69 374ms 17 Apr 2023 684th janbehrens 🇩🇪 851 69 391ms 15 May 2023 684th arctouch-cristiannevianna 851 69 381ms 18 May 2023 684th jwonagel 851 69 384ms 29 Sep 2023 684th apocriva 851 69 380ms 24 Nov 2023 684th markcahigyan 🇭🇺 851 69 374ms 7 Feb 2024 684th sultan 851 69 373ms 28 Feb 2024 684th Matto58 851 69 349ms 8 Nov 2024 684th TRexOnGit 851 69 387ms 28 Nov 2024 684th SpareManiKatti 851 69 343ms 7 Apr 2025 694th dokutan 851 96 14ms 16 Apr 2023 694th Poehavshi 851 96 13ms 26 Jun 2023 694th kurkale6ka 851 96 14ms 19 Nov 2023 694th chartung17 851 96 14ms 17 Dec 2023 694th jbjd 851 96 14ms 19 Feb 2024 694th msrawsonwork 851 96 13ms 1 Mar 2024 694th Grrisly 851 96 13ms 25 Mar 2024 694th yuchuehw 851 96 14ms 13 May 2024 702nd Shanethegamer 🇺🇸 851 132 6ms 20 Aug 2023 703rd snoozingnewt 🇨🇦 851 144 405ms 13 days ago 704th MeWhenI 🇻🇦 850 52 1,065ms 17 Apr 2023 705th DialFrost 🇸🇬 848 57 19ms 28 Feb 2025 706th ovs-code 🇩🇪 847 97 3ms 16 Jun 2025 707th GrayJoKing 🇦🇺 847 103 43ms 19 Apr 2023 708th rucin93 🇵🇱 846 159 5ms 21 Apr 2025 709th MeWhenI 🇻🇦 844 46 4ms 12 Aug 2024 710th MeWhenI 🇻🇦 843 102 9ms 6 Mar 2024 711th Murphy4444 842 19 227ms 24 days ago 712th grospolina 842 80 52ms 2 Oct 2024 713th juliusgeo 842 97 21ms 19 Apr 2023 713th Just4FunCoder 842 97 13ms 27 Oct 2023 715th MeWhenI 🇻🇦 839 53 9ms 28 Sep 2024 716th stefangimmillaro 839 64 3,121ms 31 Oct 2024 716th emgordon154 839 64 2,877ms 30 Jan 2025 718th edsrzf 🇳🇿 839 105 63ms 2 May 2025 719th antimon2 🇯🇵 839 144 361ms 29 Oct 2024 720th neel11235813 837 89 404ms 28 Mar 2024 First Prev 641–720 of 1,442 Next Last