Date (command)

date command allows to print or set the system date and time.

Basic Examples

$ date -d now
Wed Aug 18 16:47:31 EDT 2019

$ date -d today
Wed Aug 18 16:47:32 EDT 2019

$ date -d yesterday
Tue Aug 17 16:47:33 EDT 2019

$ date -d tomorrow
Thu Aug 19 16:46:34 EDT 2019

$ date -d sunday
Sun Aug 22 00:00:00 EDT 2019

$ date -d last-sunday
Sun Aug 15 00:00:00 EDT 2019
Other valid date time strings include: last-week, next-week, last-month, next-month, last-year, and next-year.

$ date +%b
Aug 

$ date +%B
August

$date "+%Y-%m-%d"
2020-10-11

$date "+%F_%H:%M-%Z"
2020-11-22_12:18-UTC


MacOS:
$ date +%F_-%T
2020-08-03_-09:14:54

Activities

1. Read date man page: http://man7.org/linux/man-pages/man1/date.1.html