In one of my XPages applications I needed a lot of date manipulation. I came at a point to create a DateUtilts class with, in opinion, very useful Date and Calendar methods.
I have uploaded on it to XSnippets, so everyone can benefit from it.
Is today between 2 dates
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
String dateStartInString = "31-08-2015";
String dateEndInString = "31-08-2016";
Date dateStart = sdf.parse(dateStartInString);
Date dateEnd = sdf.parse(dateEndInString);
output = true