What is a date-time?
The date-time or timestamp usually contains the date and time of day. In computer transactions, the date-time is accompanied by seconds and fractions of a second. A datetime or timestamp indicates the exact date and time when a certain event occurred. For example, in computer science log files always contain a datetime resp. timestamp for each entry. An application can be debugged using this information, which allows the user to identify the exact time and date of when a problem occurred.