Kata Library
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algorithms
9
Arrays
1
Date Time
16
Fundamentals
6
Language Features
1
Mathematics
1
Parsing
1
Regular Expressions
2
Sorting
1
Strings
16
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
16 Kata Found
6 kyu
Cuckoo Clock
1,285
brodiemark
Strings
Date Time
4 kyu
Human readable duration format
86,575
davazp
5 Issues Reported
Strings
Date Time
Algorithms
Beta
Two Way Military Time Converter
5
whendon18
2 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Date Time
Strings
Regular Expressions
Algorithms
6 kyu
Berlin Clock
557
dupreesi
3 Issues Reported
Date Time
Strings
Fundamentals
7 kyu
Decimal Time Conversion
1,246
Galvlbit
Fundamentals
Algorithms
Date Time
Strings
6 kyu
Simple time difference
1,513
KenKamau
3 Issues Reported
Algorithms
Date Time
Strings
6 kyu
What century is it?
11,479
user1511460
1 Issue Reported
Strings
Algorithms
Date Time
7 kyu
The Coupon Code
31,346
yaphi1
2 Issues Reported
Date Time
Strings
Fundamentals
Beta
Inspector Fu & Sergeant Bar: Ambiguous Dates
6
tayloia
Status:
Ranking feedback needed
Estimated Rank:
5 kyu
Language Features
Date Time
Algorithms
Strings
6 kyu
Next good time
89
goldenratio161
Algorithms
Strings
Date Time
7 kyu
Palindrome Timestamps
94
saudiGuy
Algorithms
Date Time
Strings
6 kyu
What's your running pace?
944
int3_0xcc
2 Issues Reported
Mathematics
Strings
Algorithms
Date Time
Beta
Time Conversion
103
iCombii
2 Issues Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
7 kyu
Date Time
Strings
Fundamentals
6 kyu
T.T.T.15: Sort the alarm clock
43
myjinxin2015
Date Time
Strings
Arrays
Sorting
Beta
How old are you?
47
alamart
1 Issue Reported
Status:
Waiting for issues to be resolved
Date Time
Strings
Parsing
Fundamentals
Beta
Time Conversion: 12s and 24s
55
colbydauph
3 Issues Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
6 kyu
Strings
Date Time
Regular Expressions
Fundamentals
Confirm
Collect:
undefined
Loading collection data...