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I am having problem with creatng date formate: YYYYMMDD .
My code is: date +%Y%m%d but its not working it. I checked %Y only displays current year not past year. suppose if i enter my date: 18240804 it doesn't accept it. IT only takes 20070804.. not past years. What is date -s do?
So my point is %Y is only for current year not for past year. I want to create script which accepts past years day and months like this: YYYMMDD. I read man page i couldn't find out what is date -s ? please provide me some example and with past year.
The GNU date command accept the -d option to specify a date other than the current date. From the info page:
Display the date and time specified in DATESTR instead of the
current date and time. DATESTR can be in almost any common
format. It can contain month names, time zones, `am' and `pm',
`yesterday', etc. For example, `--date="2004-02-27
14:19:13.489392193 +0530"' specifies the instant of time that is
489,392,193 nanoseconds after February 27, 2004 at 2:19:13 PM in a
time zone that is 5 hours and 30 minutes east of UTC. *Note Date
Check the section "Note Date input formats" for details on how to specify the past date. The following are all working examples:
date -d "23 June 1867" +%Y%m%d
date -d "Jul 11, 1968 - 3 days" +%Y%m%d
date -d "2 days ago" +%Y%m%d