Date
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External
Internal
Overview
date +'%m/%d/%y %H:%M:%S'
Output:
03/07/11 16:07:17
Double quotes also work:
date +"%m/%d/%y %H:%M:%S"
This also works:
date "+%m/%d/%y %H:%M:%S"
Output Patterns
%s seconds since epoch (?)
Time Zone
+%z
-0700
AM/PM
date +'%m/%d/%y %I:%M:%S %p'
Year
Short year (14) %y
Long year (2014) %Y
Month
%m
Hour
24-hour hour: %H
Displaying Date in a Different Timezone
Configure the desired timezone by setting up the TZ environment variable:
TZ="America/Los_Angeles"
To list available timezones, either list files in /usr/share/zoneinfo or run:
timedatectl list-timezones
File Name Format
date +'%y.%m.%d-%H.%M.%S'
or
date +'%Y.%m.%d'
Setting Date and Time
date 08311650
sets the date for 08/31 current year, time 16:50.
Getting the Time in Seconds
date '+%s'
Elapsed Time in Seconds
local t0=$(date '+%s')
sleep 2
local t1=$(date '+%s')
local elapsed=$(expr ${t1} - ${t0})
echo "elapsed seconds: ${elapsed}"
ISO 8601 Format
date "+%Y-%m-%dT%H:%M:%S%z"
Also see: