The
Calendar
hole will go live in approximately
9 days
. 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
All Languages
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AWK
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brainfuck
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D
Dart
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Factor
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Janet
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VimL
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05AB1E
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Egel
Fennel
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Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
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Uiua
Umka
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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
Hole
Golfer
Bytes
Time
Submitted
Happy Numbers (Long)
TheZwierzLF
107
38ms
3 hours ago
Mandelbrot
TheZwierzLF
129
1,552ms
3 hours ago
Hexdump
TheZwierzLF
207
39ms
3 hours ago
√2
TheZwierzLF
114
48ms
3 hours ago
Arrows
TheZwierzLF
289
55ms
3 hours ago
Minesweeper
TheZwierzLF
189
1,279ms
3 hours ago
Proximity Grid
TheZwierzLF
166
79ms
4 hours ago
Jacobi Symbol
TheZwierzLF
147
54ms
4 hours ago
Zodiac Signs
TheZwierzLF
204
43ms
4 hours ago
Medal Tally
TheZwierzLF
264
47ms
6 hours ago
Foo Fizz Buzz Bar
TheZwierzLF
128
48ms
6 hours ago
Intersection
TheZwierzLF
156
47ms
7 hours ago
Calendar
stefangimmillaro
132
40ms
14 hours ago
Rijndael S-box
TheZwierzLF
227
45ms
20 hours ago
Tic-tac-toe
TheZwierzLF
166
47ms
20 hours ago
Levenshtein Distance
TheZwierzLF
194
58ms
20 hours ago
Kolakoski Sequence
TheZwierzLF
79
131ms
20 hours ago
Fractions
TheZwierzLF
67
38ms
20 hours ago
Smith Numbers
TheZwierzLF
130
184ms
21 hours ago
Forsyth–Edwards Notation
TheZwierzLF
155
36ms
21 hours ago
Scrambled Sort
TheZwierzLF
131
33ms
21 hours ago
Abundant Numbers (Long)
TheZwierzLF
51
62ms
21 hours ago
ISBN
TheZwierzLF
82
38ms
21 hours ago
Spelling Numbers
TheZwierzLF
503
52ms
21 hours ago
Rock-paper-scissors-Spock-lizard
TheZwierzLF
285
48ms
21 hours ago
Set
TheZwierzLF
98
71ms
21 hours ago
Abundant Numbers
TheZwierzLF
50
47ms
21 hours ago
ASCII Table
TheZwierzLF
140
40ms
21 hours ago
Repeating Decimals
TheZwierzLF
301
43ms
21 hours ago
Happy Numbers
TheZwierzLF
106
33ms
21 hours ago
Poker
TheZwierzLF
459
43ms
21 hours ago
Billiards
blaztoma
107
32ms
22 hours ago
Transpose Sentence
TheZwierzLF
68
40ms
24 hours ago
Christmas Trees
TheZwierzLF
66
36ms
24 hours ago
Inventory Sequence
TheZwierzLF
53
52ms
24 hours ago
Tower of Hanoi
TheZwierzLF
81
32ms
24 hours ago
Billiards
TheZwierzLF
215
51ms
25 hours ago
Pernicious Numbers
TheZwierzLF
62
53ms
25 hours ago
Pernicious Numbers (Long)
TheZwierzLF
63
50ms
25 hours ago
Number Spiral
TheZwierzLF
179
50ms
25 hours ago
Sierpiński Triangle
TheZwierzLF
70
40ms
27 hours ago
Ordinal Numbers
TheZwierzLF
80
35ms
27 hours ago
Kolakoski Constant
TheZwierzLF
107
3,076ms
27 hours ago
Game of Life
TheZwierzLF
211
293ms
28 hours ago
Calendar
Natanaelel
157
51ms
29 hours ago
Odious Numbers (Long)
TheZwierzLF
44
36ms
29 hours ago
Odious Numbers
TheZwierzLF
43
40ms
29 hours ago
Evil Numbers
TheZwierzLF
43
47ms
29 hours ago
N Queens
TheZwierzLF
120
77ms
29 hours ago
Calendar
pardouin
141
35ms
30 hours ago
Cubes
blaztoma
191
45ms
32 hours ago
Leyland Numbers
TheZwierzLF
73
34ms
42 hours ago
Pangram Grep
TheZwierzLF
54
36ms
42 hours ago
Collatz
TheZwierzLF
66
39ms
42 hours ago
Fibonacci
TheZwierzLF
34
55ms
44 hours ago
Farey Sequence
TheZwierzLF
170
86ms
44 hours ago
Pascal’s Triangle
TheZwierzLF
59
56ms
45 hours ago
Tongue-twisters
TheZwierzLF
433
47ms
45 hours ago
Pangram Grep
kmathis22
87
41ms
47 hours ago
Continued Fractions
Matter1024
98
33ms
2 days ago
Diamonds
TheZwierzLF
117
38ms
2 days ago
Time Distance
TheZwierzLF
279
45ms
2 days ago
PalindromemordnilaP
xsot
50
37ms
2 days ago
Rule 110
TheZwierzLF
121
110ms
2 days ago
Arabic to Roman
TheZwierzLF
137
98ms
2 days ago
Reverse Polish Notation
TheZwierzLF
86
47ms
2 days ago
Factorial Factorisation
TheZwierzLF
90
59ms
2 days ago
12 Days of Christmas
TheZwierzLF
466
42ms
2 days ago
Christmas Trees
blaztoma
59
34ms
2 days ago
Tower of Hanoi
JayXon
🥇
47
37ms
2 days ago
Hexagonal Spiral
bitsandbeyond
168
33ms
2 days ago
N Queens
blaztoma
🥈
83
118ms
2 days ago
Calendar
ovs-code
142
38ms
3 days ago
Pernicious Numbers
blaztoma
30
41ms
3 days ago
Set
sean-niemann
74
51ms
3 days ago
Catalan Numbers
TheZwierzLF
71
45ms
3 days ago
Kaprekar Numbers
TheZwierzLF
263
3,693ms
3 days ago
Sierpiński Triangle
blaztoma
57
37ms
3 days ago
Emirp Numbers (Long)
TheZwierzLF
86
442ms
3 days ago
Cubes
TheZwierzLF
180
37ms
3 days ago