daysBeteenDates will calculate the number of days between 2 dates in the form of 'YYYY-MM-DD'.

How Long Has It Been Since a Certain Date?

If you only want to compare yyyy-mm-dd you can use the java.sql.Date class, the valueOf method does the trick. It's perfectly safe as the sql Date class is a subclass of the Date class.

Check out the docs here for more detail.

enjoy

A handy class I use all the time to encapsulate the idea of whether two events coincide. For example, given a time period representing a shift, and a list of time periods representing transactions or sessions or whatever, find which ones are either totally or partially within the time period. This class make it a bit easier.

Compare two dates in Java.

Computes the difference between two dates in seconds

Date Parse

This function will convert a Date (passed as type TDateTime) to a long-format Julian calendar date (result as type String).

This function returns a Date object being set at 12 A.M. It is useful for comparing dates where you don't know if they'll come set at the beginning of the day or not.

Optimized way to calculate age from timestamp,
the idea is not to use date() call at all if possible.