Read this article if your application deals with usernames:
https://www.kalzumeus.com/2010/06/17/falsehoods-programmers-believe-about-names/
Read this article if your application deals with time on computer:
https://infiniteundo.com/post/25326999628/falsehoods-programmers-believe-about-time
Now read this if its a JAVA Application:
https://yawk.at/java.time/
