A Date, or Calendar Date, is a reference to a particular day represented within a calendar system. The Calendar date allows the specific day to ve identified. he number of days between two dates may be calculated. For example, "24 January 2019" is ten days after "14 January 2019" in the Gregorian calendar. The date of a particular event depends on the observed time zone. For example, the air attack on Pearl Harbor that began at 7:48 a.m. Hawaiian time on December 7, 1941, took place at 3:18 a.m. December 8 in Japan (Japan Standard Time).
A particular day may be represented by a different date in another calendar as in the Gregorian calendar and the Julian calendar, which have been used simultaneously in different places. In most calendar systems, the date consists of three parts: the day of month, month, and the year. There may also be additional parts, such as the day of week. (wikipedia)
This tool was developed for programmers and testers who have the constant need to enter different date in developing forms.