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Different Date/Time format in shell

Remarks:

Below are a few useful links for the date command in Unix shells:

Linux: GNU man page for date, includes format codes, see also GNU man page for strftime
FreeBSD: BSD man page for date, format codes live in BSD man page for strftime
Apple: OS X man page for date, format codes live in OS X man page for strftime
Epoch: Unix time, also known as POSIX time (%s, seconds since 1970)

Sample Code & output

#!/bin/bash

#Print Date / Time in different Formats
date1=$(date +'%d-%m-%y')
date2=$(date +'%d-%m-%Y')
date3=$(date +'%d-%b-%Y')
date4=$(date +'%d-%B-%Y')
date5=$(date +'%a %d-%b-%Y')
date6=$(date +'%a %d-%b-%Y  %Z')
date7=$(date +'%A %d-%b-%Y')

echo "Print Date in different format"
echo $date1
echo $date2
echo $date3
echo $date4
echo $date5
echo $date6
echo $date7
echo

#print Timestamp
time1=$(date '+%H:%M:%S')
time2=$(date '+%I:%M:%S')
time3=$(date '+%r')
time4=$(date '+%R')

echo "Print Time in different format"
echo "Time in 24h clock: $time1"
echo "Time in 12h clock: $time2"
echo "Time with AM/PM: $time3"
echo "Time in hour&minute: $time4"

exit

Output

Print Date in different format
01-08-16
01-08-2016
01-Aug-2016
01-August-2016
Mon 01-Aug-2016
Mon 01-Aug-2016 IST
Monday 01-Aug-2016

Print Time in different format
Time in 24h clock: 15:16:06
Time in 12h clock: 03:16:06
Time with AM/PM: 03:16:06 PM
Time in hour&minute: 15:16

Parameters:

Format	Interpreted as
`%%`	literal percent sign (%)
`%A`	weekday name (e.g. Sunday)
`%a`	weekday name in short fomat (e.g. Sun)
`%B`	full month name (e.g. January)
`%b`	month name (e.g. Jan)
`%H`	hour (00..23)
`%I`	hour (01..12)
`%j`	day of year (001..366)
`%k`	hour ( 0..23)
`%l`	hour ( 1..12)
`%M`	minute (00..59)
`%m`	month (01..12)
`%p`	Define AM or PM; blank if not known
`%R`	24-hour hour and minute; same as %H:%M
`%r`	12-hour clock time (e.g. 11:11:04 PM)
`%S`	second (00..60)
`%s`	Unix epoch: seconds since 1970-01-01 00:00:00 UTC (not available in older UNIXes)
`%T`	time, equivalent to `%H:%M:%S`
`%Z`	time zone name (e.g. PDT)
`%z`	time zone offset (direction, hours, minutes, e.g. -0700)

Contributors

Topic Id: 4850

Example Ids: 17094

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