The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Intersection 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 801st 386asm 🇺🇸 681 223 43ms 27 Apr 2023 802nd djeedjay 🇳🇱 680 198 2ms 25 Oct 2020 802nd LorenzoDeGaspari 680 198 2ms 2 May 2024 804th jared-hughes 679 55 34ms 6 Nov 2021 804th SirBogman 🇺🇸 679 55 33ms 22 Sep 2025 806th JDiLenarda 🇫🇷 679 214 354ms 18 Nov 2023 807th zakariamouhid 678 140 9ms 1 Mar 2023 808th Starwort 🇬🇧 678 154 11ms 5 Mar 2021 808th nstearns96 🇬🇧 678 154 10ms 15 Dec 2022 810th Bubbler-4 677 134 73ms 13 Sep 2023 811th billings7 🇬🇧 676 215 334ms 21 Nov 2021 812th snoozingnewt 🇨🇦 675 197 111ms 2 Oct 2025 813th jared-hughes 674 120 104ms 17 Jul 2022 814th fuzzylojik-golf 🇺🇸 674 133 456ms 3 Jul 2025 815th dsntzn 🇸🇰 674 141 9ms 13 Oct 2020 815th lynn 674 141 9ms 30 Aug 2021 815th FlorianCassayre 🇫🇷 674 141 9ms 14 Jun 2024 815th Protothor 674 141 9ms 23 Jun 2025 815th acollett89 674 141 9ms 25 Jul 2025 815th JOrE20 🇺🇸 674 141 9ms 20 days ago 821st cipharius 674 177 2ms 20 Jan 2021 822nd snoozingnewt 🇨🇦 674 227 3,130ms 6 Oct 2025 823rd sciencejiho 673 155 10ms 26 Sep 2024 824th stefangimmillaro 673 167 205ms 18 Sep 2022 825th czylabsonasa 🇭🇺 672 116 295ms 15 Jun 2022 825th MarcMush 🇫🇷 672 116 357ms 15 Nov 2023 827th MeWhenI 🇻🇦 672 140 137ms 3 Aug 2024 828th MeWhenI 🇻🇦 671 197 43ms 13 Feb 2025 829th jgbaldwinbrown 670 236 273ms 29 Jun 2021 830th Maznek 669 142 9ms 31 Jan 2024 830th junkondo-jp 669 142 9ms 5 May 2024 830th Andrey-Plotnikov 669 142 9ms 17 May 2024 830th Dataen 669 142 10ms 9 Jun 2024 834th Anonymousellama21 669 156 10ms 8 Dec 2021 834th Bananapants22 669 156 11ms 30 Aug 2022 834th NickTheEASDude 🇺🇸 669 156 11ms 6 May 2024 837th edsrzf 🇳🇿 669 168 4ms 6 Oct 2024 838th stefangimmillaro 668 153 4,446ms 31 Oct 2024 838th emgordon154 668 153 4,808ms 24 Jul 2025 840th mdznr 668 199 107ms 14 Dec 2020 841st primo-ppcg 🇹🇭 667 56 34ms 16 Oct 2020 842nd MeWhenI 🇻🇦 667 193 165ms 29 Apr 2025 843rd KatieLG 🇬🇧 667 218 404ms 1 May 2024 844th Andre3582 665 157 11ms 6 Nov 2020 844th DrPiranoid 665 157 10ms 24 Sep 2022 844th Bodo171 665 157 16ms 27 Nov 2022 844th gthayden23 665 157 31ms 29 Oct 2023 844th vhoulbreque 🇫🇷 665 157 1,506ms 17 days ago 849th UBKorkut 664 143 9ms 12 Mar 2021 849th olleicua 🇺🇸 664 143 9ms 3 Feb 2024 851st saito-ta 🇯🇵 664 238 1,173ms 4 Jul 2022 852nd CaedenHarper 🇨🇦 664 265 508ms 3 Oct 2025 853rd LHLaurini 🇧🇷 663 203 2ms 30 Jun 2024 854th CatsAreFluffy 662 231 79ms 12 Dec 2022 855th cbrt-x 662 266 460ms 29 Sep 2021 856th Omega65536 🇩🇪 661 158 10ms 7 Jan 2021 856th Bonjour27891 🇻🇳 661 158 11ms 13 Mar 2022 856th Tess2662 661 158 15ms 4 Mar 2023 856th jeff-at-tamer-dot-codes 🇺🇸 661 158 10ms 18 May 2023 856th Player01osu 661 158 10ms 29 Oct 2023 856th epic-programmer-guy 661 158 10ms 31 Dec 2023 856th robin-scragg 661 158 9ms 9 Oct 2025 863rd Shanethegamer 🇺🇸 661 200 42ms 10 Sep 2024 864th verticallity 661 254 177ms 6 Apr 2022 865th daveberlin 660 144 9ms 21 Oct 2023 866th edsrzf 🇳🇿 660 155 3,807ms 25 Oct 2024 867th janbehrens 🇩🇪 660 267 433ms 16 May 2023 868th primo-ppcg 🇹🇭 659 98 38ms 14 Oct 2020 869th emgordon154 659 139 5ms 30 Dec 2024 870th Yewzir 🇧🇪 659 232 458ms 27 Jan 2024 871st KatieLG 🇬🇧 658 121 1,020ms 25 Apr 2021 872nd janbehrens 🇩🇪 658 206 471ms 19 Jul 2022 873rd memmaptensor 🇹🇭 658 221 352ms 21 Jan 2022 874th glesnick 656 159 10ms 15 Jul 2022 875th VictorChemin 🇫🇷 656 205 2ms 26 Nov 2021 875th pyrolitic 🇮🇪 656 205 2ms 26 Apr 2022 875th CatsAreFluffy 656 205 2ms 25 Jan 2023 878th JunkIce 655 137 462ms 3 Dec 2024 879th GrayJoKing 🇦🇺 655 171 109ms 24 Nov 2021 880th Shanethegamer 🇺🇸 654 140 5ms 14 Mar 2025 First Prev 801–880 of 1,299 Next Last