The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Reverse Polish Notation 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 391st MeWhenI 🇻🇦 796 40 72ms 6 Nov 2023 391st error256 796 40 67ms 5 May 2024 391st edsrzf 🇳🇿 796 40 64ms 25 Sep 2024 391st pardouin 🇫🇷 796 40 76ms 25 Sep 2024 391st sean-niemann 🇺🇸 796 40 65ms 9 Apr 2025 391st DialFrost 🇸🇬 796 40 64ms 9 Apr 2025 391st fuzzylojik-golf 🇺🇸 796 40 62ms 17 Sep 2025 391st JayXon 🇺🇸 796 40 72ms 4 Nov 2025 409th ovs-code 🇩🇪 796 312 458ms 1 Feb 2025 410th JRaspass 🇬🇧 795 51 6ms 12 Feb 2022 410th akshatj27 🇦🇶 795 51 5ms 12 Feb 2022 410th NewDefectus 🇮🇱 795 51 5ms 12 Feb 2022 410th ovs-code 🇩🇪 795 51 6ms 4 May 2023 414th sean-niemann 🇺🇸 795 92 138ms 12 Jun 2025 415th verticallity 795 235 189ms 5 Apr 2022 416th clockworknazo 793 79 19ms 14 Nov 2022 417th primo-ppcg 🇹🇭 793 189 39ms 6 Jul 2022 418th nwellnhof 🇩🇪 792 73 346ms 3 Jun 2022 419th m-tkach 🇺🇦 792 235 57ms 6 Aug 2023 420th andersk 🇺🇸 792 236 196ms 1 Nov 2022 420th funnsam 🇭🇰 792 236 237ms 23 Oct 2023 422nd jared-hughes 792 261 9ms 8 Jul 2024 423rd amollberg 🇸🇪 791 131 17ms 15 Feb 2022 423rd 5quiwyrm 791 131 17ms 11 Feb 2023 423rd BREMAUCY 🇫🇷 791 131 18ms 26 Jul 2023 423rd vishwathg 791 131 16ms 25 Jul 2025 423rd InigoK 🇺🇸 791 131 11ms 30 Aug 2025 428th GolfingSuccess 🇬🇷 791 132 6ms 29 Jan 2024 429th inventshah 791 182 3ms 14 Sep 2022 430th GolfingSuccess 🇬🇷 791 314 1,475ms 3 Feb 2025 431st pardouin 🇫🇷 790 103 1,778ms 9 Aug 2025 432nd Vinterion 789 212 32ms 6 Oct 2024 432nd edsrzf 🇳🇿 789 212 31ms 4 May 2025 434th primo-ppcg 🇹🇭 789 236 26ms 25 Jun 2022 435th nwellnhof 🇩🇪 788 62 38ms 4 Jun 2022 435th KL-Lru 788 62 39ms 29 Dec 2022 435th Natanaelel 🇸🇪 788 62 40ms 9 Dec 2023 438th prplz 🇦🇺 788 93 10ms 14 Feb 2022 438th primo-ppcg 🇹🇭 788 93 10ms 16 Feb 2022 438th kcinnu 🇱🇹 788 93 10ms 16 Aug 2022 438th dzshn 788 93 10ms 24 Aug 2022 438th eranws 788 93 9ms 13 Oct 2022 438th biocommando 🇫🇮 788 93 10ms 13 Mar 2024 438th BalaM314 788 93 10ms 7 Feb 2025 438th Andrey-Plotnikov 788 93 9ms 25 Jun 2025 446th KasperKivimaeki 🇫🇮 788 178 454ms 10 days ago 447th mousetail 🇳🇱 788 237 193ms 16 May 2024 448th Shanethegamer 🇺🇸 787 183 4ms 11 Sep 2022 449th MeWhenI 🇻🇦 786 127 253ms 12 Apr 2024 450th 2bular 785 44 3ms 21 Jun 2025 451st lifthrasiir 🇰🇷 785 105 502ms 2 Dec 2024 452nd btnlq 785 131 22ms 30 Mar 2022 453rd ndren 785 132 36ms 11 Nov 2023 453rd mikehanus 785 132 16ms 21 Nov 2023 453rd logvp 785 132 15ms 28 Dec 2023 453rd dokutan 785 132 15ms 14 Sep 2024 457th GrayJoKing 🇦🇺 784 104 5ms 31 Aug 2023 458th duckyluuk 🇳🇱 783 143 9ms 26 Feb 2025 459th MostParsingVex 783 150 2ms 3 Jan 2025 460th GolfingSuccess 🇬🇷 783 184 3ms 11 Sep 2022 461st KrausRaus 🇺🇸 780 94 10ms 13 Feb 2022 461st SirBogman 🇺🇸 780 94 10ms 7 May 2022 461st iliazeus 780 94 29ms 4 Sep 2022 461st Natanaelel 🇸🇪 780 94 10ms 9 Dec 2023 461st LukeBridges 🇬🇧 780 94 10ms 2 Oct 2024 466th Indivicivet 779 133 16ms 9 May 2022 466th QuincyNash 🇺🇸 779 133 17ms 2 Dec 2022 466th 2011-Chan-Ethan 779 133 15ms 16 Sep 2023 466th yuchuehw 779 133 17ms 3 Feb 2024 466th neel11235813 779 133 14ms 17 Mar 2024 466th joll05 🇸🇪 779 133 15ms 1 Oct 2025 466th Babafaba 779 133 15ms 23 Oct 2025 473rd emgordon154 778 94 129ms 14 Nov 2024 473rd ovs-code 🇩🇪 778 94 136ms 17 Apr 2025 473rd rucin93 🇵🇱 778 94 136ms 13 Jun 2025 476th GolfingSuccess 🇬🇷 778 144 9ms 30 Jan 2025 477th jwhear 🇺🇸 778 240 224ms 20 Mar 2023 478th Shanethegamer 🇺🇸 777 41 70ms 5 Dec 2024 479th GolfingSuccess 🇬🇷 776 126 5ms 20 Aug 2024 480th CLOStrophobic 🇮🇹 776 133 6ms 19 Feb 2025 First Prev 401–480 of 1,157 Next Last