DateUtil class contains static utility methods for manipulating and working with Dates. This is a useful class to simplify the date processing for programmers. For example, I want to know the day name of date August 10, 1983. What should we do with DateUtil? As we know, DateFiled provide a static method named stringToDate(). So, I get the day name of August 10, 1983 like this: DateUtil. getFullDayName (DateField. stringToDate(“08/10/1983”,”MM/DD/YYYY”)). What should we do without DateUtil?