Linux Date command

Linux date command allows you to display the current date and time.

Written under Linux commands

Summary

The root user can set the system time and date using the date command.

Purpose

Linux date command allows you to display the current date and time.

Syntax

The date command can be used without an option.

Options

-d--date=STRING
display time described by STRING, not `now'

-f--file=DATEFILE
like --date once for each line of DATEFILE

-r--reference=FILE
display the last modification time of FILE

-R--rfc-2822
output date and time in RFC 2822 format. Example: Mon, 07 Aug 2006 12:34:56 -0600

--rfc-3339=TIMESPEC
output date and time in RFC 3339 format. TIMESPEC=`date', `seconds', or `ns' for date and time to the indicated precision. Date and time components are separated by a single space: 2006-08-07 12:34:56-06:00

-s--set=STRING
set time described by STRING

-u--utc--universal
print or set Coordinated Universal Time

--help
display this help and exit

--version
output version information and exit

Usage and examples

$ date -d now
Mon Jun  4 21:15:02 EDT 2018

$ date -d today
Mon Jun  4 21:15:09 EDT 2018

$ date -d yesterday
Sun Jun  3 21:16:09 EDT 2018

$ date -d tomorrow
Tue Jun  5 21:16:17 EDT 2018

$ date -d sunday
Sun Jun 10 00:00:00 EDT 2018

$ date -d last-sunday
Sun Jun  3 00:00:00 EDT 2018


How to set Linux date via terminal?

$ date -s "3 Jun 2018 11:14:00"

Alternative you can use --set option:

$ date --set="2 OCT 2006 18:00:00"

Date version command output

$ date --version
date (GNU coreutils) 8.25
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by David MacKenzie.

 

Bash format date in shell script YYYY-MM-DD:

Get year-month-day from date

DATE=`date +%Y-%m-%d`

Get year-month-day hour:minute:second from date

DATE=`date '+%Y-%m-%d %H:%M:%S'`

Other available date formats can be viewed from the date man pages:

man date