The Calendar hole will go live in approximately 19 hours. Why not try and solve it ahead of time?
Reverse Polish Notation in Python 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 79th Command-Master 852 128 102ms 29 Sep 2023 79th mathisfun271 852 128 35ms 13 Feb 2024 79th solisolu 852 128 21ms 7 hours ago 84th andre-lameirinhas 🇵🇹 845 129 16ms 29 Jul 2022 84th Mikey-Beep 🇬🇧 845 129 17ms 6 Oct 2022 84th jakobkordez 🇸🇮 845 129 37ms 1 Nov 2022 84th cros107 🇦🇺 845 129 14ms 25 May 2024 84th cubed-guy 845 129 16ms 9 Jun 2024 84th wuduculfre 845 129 10ms 22 Jul 2025 90th CedricGebistorf 838 130 17ms 16 Mar 2022 90th Flekay 🇩🇪 838 130 16ms 19 Jun 2025 92nd amollberg 🇸🇪 832 131 17ms 15 Feb 2022 92nd 5quiwyrm 832 131 17ms 11 Feb 2023 92nd BREMAUCY 🇫🇷 832 131 18ms 26 Jul 2023 92nd vishwathg 832 131 16ms 25 Jul 2025 92nd InigoK 🇺🇸 832 131 11ms 30 Aug 2025 97th ndren 826 132 36ms 11 Nov 2023 97th mikehanus 826 132 16ms 21 Nov 2023 97th logvp 826 132 15ms 28 Dec 2023 97th dokutan 826 132 15ms 14 Sep 2024 101st Indivicivet 820 133 16ms 9 May 2022 101st QuincyNash 🇺🇸 820 133 17ms 2 Dec 2022 101st 2011-Chan-Ethan 820 133 15ms 16 Sep 2023 101st yuchuehw 820 133 17ms 3 Feb 2024 101st neel11235813 820 133 14ms 17 Mar 2024 101st joll05 🇸🇪 820 133 15ms 1 Oct 2025 101st Babafaba 820 133 15ms 23 Oct 2025 108th Heathcorp 🇦🇺 813 134 25ms 7 Oct 2022 108th madex 🇩🇪 813 134 24ms 9 Jul 2024 108th LostSyntax21 🇬🇧 813 134 24ms 2 Dec 2024 108th albanian-laundromat 813 134 16ms 12 Apr 2025 108th fkantelberg 813 134 18ms 19 Jul 2025 113th janbehrens 🇩🇪 807 135 25ms 1 Jul 2022 113th mwja 807 135 15ms 21 Aug 2024 115th martinnorling 🇸🇪 801 136 29ms 15 Feb 2022 115th adoxography 801 136 18ms 20 Mar 2022 115th nullie 801 136 16ms 14 Jun 2022 115th AGoyet 801 136 16ms 17 Jul 2022 115th inverseLorentz 🇦🇺 801 136 20ms 21 Feb 2024 115th chartung17 801 136 16ms 20 Apr 2025 115th FlorianCassayre 🇫🇷 801 136 17ms 5 Aug 2025 115th Luke44565 801 136 17ms 10 Aug 2025 115th luuumine 🇫🇷 801 136 18ms 17 Oct 2025 115th Bmrl7 801 136 27ms 9 days ago 125th P-Quentin 🇫🇷 796 137 19ms 5 Aug 2022 125th nstearns96 🇬🇧 796 137 24ms 15 Dec 2022 125th mossprescott 796 137 11ms 19 Jan 2023 125th taesungh 796 137 16ms 15 Oct 2023 125th PyryL 🇫🇮 796 137 18ms 25 Aug 2024 130th michelebastione 🇮🇹 790 138 16ms 19 Feb 2022 130th knutae 🇳🇴 790 138 15ms 8 Mar 2022 130th RDShah 790 138 32ms 15 May 2022 130th SB-945 790 138 14ms 11 Jan 2024 130th ImpressedByRocks 790 138 16ms 10 Oct 2024 135th cefqrn 784 139 17ms 20 Dec 2022 135th alfonsoalves 784 139 17ms 1 Mar 2024 135th hiichbindermax 784 139 37ms 19 Sep 2024 135th jacekwladzinski 784 139 11ms 10 Oct 2025 139th Irratix 🇳🇱 779 140 12ms 27 Apr 2022 139th JunkIce 779 140 31ms 2 Dec 2024 141st SirFireball3521 773 141 37ms 7 Feb 2023 141st AstroOrbis 773 141 15ms 12 Jul 2025 141st osNiko 🇧🇷 773 141 17ms 9 hours ago 144th KatieLG 🇬🇧 768 142 90ms 12 Feb 2022 144th MichalMarsalek 🇨🇿 768 142 15ms 14 Feb 2022 144th marcin7Cd 768 142 15ms 20 Feb 2022 144th yzhs 🇩🇪 768 142 20ms 23 Jun 2023 148th SniperSmiley 🇺🇸 762 143 15ms 8 Jul 2022 148th Europe2048 762 143 24ms 22 Oct 2024 148th moustave 762 143 11ms 7 Apr 2025 151st randolchance 757 144 20ms 4 Jan 2024 151st roupiq 🇵🇱 757 144 17ms 1 Mar 2024 151st Deppyforce 757 144 15ms 9 Nov 2025 154th LeeCamp 752 145 16ms 14 Feb 2022 154th hellwue 752 145 10ms 7 Feb 2023 154th adamnielson42 🇺🇸 752 145 25ms 8 Oct 2024 154th Mabeloid 🇳🇴 752 145 26ms 4 May 2025 154th te-chnical 752 145 16ms 9 Jul 2025 159th karhuthebear 747 146 16ms 6 May 2022 159th Bonjour27891 🇻🇳 747 146 11ms 17 Jul 2022 First Prev 81–160 of 269 Next Last