The Calendar hole will go live in approximately 3 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 161st ScottHamper 860 159 350ms 21 Feb 2022 162nd stefangimmillaro 858 57 39ms 18 Feb 2022 163rd KasperKivimaeki 🇫🇮 857 137 2ms 24 Jul 2025 164th MeWhenI 🇻🇦 857 186 502ms 7 Nov 2025 165th primo-ppcg 🇹🇭 856 121 20ms 4 Mar 2022 165th EnTerr 856 121 22ms 8 Sep 2024 165th Bulmenisaurus 856 121 12ms 3 Oct 2025 165th ryyyn 🇺🇸 856 121 16ms 28 Oct 2025 165th CornerMercury 🇬🇧 856 121 16ms 118 mins ago 170th ovs-code 🇩🇪 855 164 411ms 3 Jun 2024 171st Shanethegamer 🇺🇸 854 155 143ms 14 Feb 2022 172nd Irratix 🇳🇱 853 86 10ms 13 Feb 2022 172nd emplv 🇱🇻 853 86 9ms 16 Feb 2022 172nd vlpx 🇫🇮 853 86 9ms 1 Aug 2024 175th primo-ppcg 🇹🇭 852 98 6ms 16 Feb 2022 176th Lydxn 🇨🇦 849 97 435ms 16 Jan 2024 177th Shanethegamer 🇺🇸 849 122 16ms 12 Feb 2022 177th ahmetdemirag 🇨🇾 849 122 14ms 15 Jul 2024 177th Lv0Sys 🇵🇱 849 122 23ms 22 days ago 180th tobeannouncd 849 156 143ms 9 Jan 2024 181st primo-ppcg 🇹🇭 847 71 5ms 23 Apr 2025 181st frankgraziano 847 71 8ms 23 Apr 2025 183rd xsot 🇸🇬 846 74 2ms 2 Feb 2025 184th ChiefChippy2 845 48 6ms 12 Feb 2022 184th GrayJoKing 🇦🇺 845 48 5ms 12 Feb 2022 184th o0lit3 🇺🇸 845 48 5ms 12 Feb 2022 184th Lydxn 🇨🇦 845 48 6ms 13 Feb 2022 184th lynn 845 48 5ms 13 Feb 2022 184th scpchicken 🇵🇼 845 48 5ms 13 Feb 2022 184th Steffan153 🇫🇮 845 48 6ms 3 Dec 2022 184th fuzzylojik-golf 🇺🇸 845 48 6ms 3 Jun 2025 184th xsot 🇸🇬 845 48 7ms 6 Jul 2025 193rd janlelis 843 58 85ms 23 Feb 2022 193rd SirBogman 🇺🇸 843 58 42ms 10 Jan 2024 195th akshatj27 🇦🇶 843 87 10ms 12 Feb 2022 195th itsh01 843 87 10ms 15 Feb 2022 195th subzey 843 87 10ms 18 Feb 2022 195th emgordon154 843 87 10ms 20 Sep 2024 195th ovs-code 🇩🇪 843 87 10ms 16 Nov 2024 200th antimon2 🇯🇵 843 97 1,176ms 20 Oct 2024 201st IanUtley 843 122 14ms 28 Jan 2024 202nd jared-hughes 842 123 16ms 8 Sep 2022 202nd quimey 842 123 17ms 4 Jul 2023 202nd htareque 842 123 11ms 17 Oct 2023 205th GrayJoKing 🇦🇺 842 152 1,534ms 24 Jul 2025 206th pardouin 🇫🇷 842 160 3,518ms 14 Nov 2024 207th emplv 🇱🇻 842 217 283ms 19 Feb 2022 208th Lydxn 🇨🇦 841 31 4ms 28 Jul 2023 208th GrayJoKing 🇦🇺 841 31 4ms 3 Aug 2023 210th clockworknazo 841 84 21ms 13 Oct 2022 210th ovs-code 🇩🇪 841 84 22ms 7 Feb 2023 210th Steffan153 🇫🇮 841 84 20ms 7 Feb 2023 210th GrayJoKing 🇦🇺 841 84 20ms 12 Feb 2023 210th xsot 🇸🇬 841 84 21ms 6 Apr 2024 210th edsrzf 🇳🇿 841 84 21ms 9 Nov 2025 216th JayXon 🇺🇸 841 87 122ms 17 Aug 2024 217th Steffan153 🇫🇮 841 98 518ms 21 Jan 2024 218th m-tkach 🇺🇦 841 199 33ms 2 Jan 2024 219th nwellnhof 🇩🇪 840 57 1,209ms 15 Feb 2022 220th nwellnhof 🇩🇪 840 167 392ms 16 Feb 2022 220th MostParsingVex 840 167 61ms 3 Jan 2025 222nd Steffan153 🇫🇮 839 119 291ms 1 Jul 2024 222nd edsrzf 🇳🇿 839 119 7ms 13 Jan 2025 224th edsrzf 🇳🇿 839 123 6ms 11 Aug 2025 225th JayXon 🇺🇸 839 140 2ms 21 Feb 2022 226th bitsandbeyond 🇳🇱 838 69 280ms 9 Oct 2025 227th CLOStrophobic 🇮🇹 838 158 153ms 26 May 2025 228th namelessiw 838 163 392ms 1 Aug 2025 229th edsrzf 🇳🇿 838 223 232ms 10 Jun 2025 230th JayXon 🇺🇸 837 161 501ms 14 Jul 2023 231st GrayJoKing 🇦🇺 837 200 35ms 17 Jan 2023 231st Shanethegamer 🇺🇸 837 200 31ms 7 Mar 2023 233rd dvargas46 🇺🇸 835 72 53ms 21 Dec 2022 234th btjones0 835 124 16ms 25 Feb 2022 234th SirBogman 🇺🇸 835 124 16ms 7 May 2022 234th commandblockguy 🇺🇸 835 124 16ms 23 Mar 2025 237th Mukundan314 833 44 17ms 38 hours ago 238th Bubbler-4 833 69 34ms 21 Feb 2022 238th ovs-code 🇩🇪 833 69 34ms 1 Mar 2025 240th Argeento 🇵🇱 833 88 9ms 13 Feb 2022 First Prev 161–240 of 1,161 Next Last