The
Calendar
hole will go live in approximately
31 hours
. Why not try and solve it ahead of time?
Recent Solutions
Achievements
Cheevos
Golfers
Solutions
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
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><>
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
Hole
Golfer
Bytes
Time
Submitted
Zodiac Signs
edsrzf
💎
121
860ms
6 hours ago
Fibonacci
plcc0
37
729ms
19 hours ago
Emirp Numbers (Long)
DialFrost
💎
73
1,399ms
25 hours ago
Emirp Numbers (Long)
edsrzf
🥈
77
939ms
33 hours ago
Tower of Hanoi
KatieLG
324
705ms
45 hours ago
Fizz Buzz
mwarvik
63
774ms
46 hours ago
Smith Numbers
edsrzf
🥈
106
4,493ms
2 days ago
Calendar
CaedenHarper
266
883ms
2 days ago
Hexagonal Spiral
HumanoidCPU
1,345
667ms
3 days ago
Factorial Factorisation
edsrzf
🥇
94
815ms
3 days ago
Prime Numbers (Long)
edsrzf
🥇
40
857ms
3 days ago
Hexagonal Spiral
bitsandbeyond
191
941ms
3 days ago
Kaprekar Numbers
edsrzf
💎
74
3,642ms
4 days ago
Fibonacci
albanian-laundromat
37
692ms
4 days ago
Zeckendorf Representation
albanian-laundromat
🥉
86
775ms
6 days ago
Multitap Input
albanian-laundromat
141
766ms
6 days ago
Look and Say
albanian-laundromat
76
820ms
6 days ago
Hilbert Curve
edsrzf
💎
295
1,071ms
8 days ago
ASCII Table
AnAwesomGuy
129
867ms
9 days ago
Divisors
xsot
46
790ms
9 days ago
Abundant Numbers (Long)
xsot
🥇
47
922ms
9 days ago
Abundant Numbers
xsot
🥇
47
935ms
9 days ago
Arithmetic Numbers
xsot
🥇
56
4,031ms
9 days ago
Kolakoski Sequence
xsot
🥈
53
849ms
9 days ago
Tower of Hanoi
emgordon154
57
906ms
9 days ago
PalindromemordnilaP
error256
63
948ms
9 days ago
PalindromemordnilaP
xsot
💎
58
821ms
11 days ago
12 Days of Christmas
edsrzf
453
798ms
11 days ago
PalindromemordnilaP
edsrzf
🥈
59
957ms
11 days ago
γ
JOrE20
1,009
743ms
13 days ago
Set
xsot
🥉
105
1,508ms
13 days ago
Tower of Hanoi
gigaprofisi
3,604
654ms
13 days ago
Tutorial
JOrE20
46
1,264ms
15 days ago
Repeating Decimals
edsrzf
💎
97
946ms
15 days ago
Leap Years
edsrzf
🥇
39
642ms
15 days ago
Arrows
dokutan
127
1,296ms
15 days ago
Emojify
dokutan
191
991ms
16 days ago
Morse Encoder
edsrzf
🥈
139
821ms
17 days ago
Ascending Primes
edsrzf
🥈
67
934ms
18 days ago
Time Distance
edsrzf
🥉
240
812ms
18 days ago
Scrambled Sort
xsot
🥈
68
728ms
19 days ago
Tongue-twisters
albanian-laundromat
🥈
311
672ms
19 days ago
Abundant Numbers (Long)
Florian-Mt
65
797ms
19 days ago
Abundant Numbers
Florian-Mt
64
703ms
19 days ago
Niven Numbers
snoozingnewt
🥇
40
651ms
19 days ago
ROT13
snoozingnewt
48
637ms
19 days ago
Niven Numbers (Long)
snoozingnewt
🥇
47
695ms
19 days ago
Rule 110
CaedenHarper
🥉
76
805ms
20 days ago
Tower of Hanoi
retrohun
8,686
734ms
20 days ago
Rijndael S-box
edsrzf
💎
132
725ms
21 days ago
Quine
GolfingSuccess
🥇
38
702ms
21 days ago
Fibonacci
GolfingSuccess
🥇
34
1,629ms
21 days ago
λ
edsrzf
💎
156
1,920ms
22 days ago
λ
sean-niemann
🥈
176
2,466ms
22 days ago
Card Number Validation
JOrE20
136
754ms
23 days ago
φ
xsot
🥇
34
678ms
23 days ago
√2
xsot
🥇
33
690ms
23 days ago
Vampire Numbers
sean-niemann
🥈
123
1,373ms
23 days ago
Levenshtein Distance
sean-niemann
🥈
122
4,251ms
23 days ago
φ
sean-niemann
🥇
34
670ms
23 days ago
√2
sean-niemann
🥇
33
675ms
23 days ago
Forsyth–Edwards Notation
sean-niemann
🥉
94
714ms
23 days ago
Transpose Sentence
sean-niemann
🥉
80
762ms
23 days ago
Time Distance
sean-niemann
💎
202
951ms
23 days ago
Arabic to Roman
sean-niemann
112
960ms
24 days ago
Recamán
sean-niemann
🥈
54
738ms
24 days ago
Inventory Sequence
sean-niemann
🥉
50
789ms
24 days ago
Look and Say
sean-niemann
🥇
66
762ms
24 days ago
Trinomial Triangle
sean-niemann
🥈
72
719ms
24 days ago
Abundant Numbers (Long)
sean-niemann
49
777ms
24 days ago
Pangram Grep
sean-niemann
🥇
48
822ms
24 days ago
United States
sean-niemann
🥉
90
986ms
24 days ago
Scrambled Sort
snoozingnewt
93
781ms
24 days ago
Gray Code Decoder
albanian-laundromat
53
771ms
24 days ago
Sierpiński Triangle
edsrzf
🥈
58
682ms
24 days ago
Prime Numbers (Long)
Florian-Mt
63
3,111ms
24 days ago
Prime Numbers
Florian-Mt
62
693ms
24 days ago
Diamonds
edsrzf
🥉
77
740ms
26 days ago
Ascending Primes
xsot
💎
66
811ms
26 days ago
Divisors
sean-niemann
47
684ms
26 days ago