Date command is an external bash program that allows to set or display system date and time. It also provides several formatting options. Date command is installed in all Linux distros by default.
Type date command  in terminal which will display current date and time.
Change Linux System Date and Time
Using date command, system date, time and timezone can be modified and the change has to be synced with the hardware clock
Formatting Options
A good place to get the list of formatting options will be the man page.

#date command #date and time #bash