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want to get previous date from date command in ksh

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# 1  
Old 09-04-2008
want to get previous date from date command in ksh
I want to get previous date from date command. I am using ksh shell.

Exmp:

today is 2008.09.04

I want the result : 2008.09.03

Please help.

Thanks in advance.
# 2  
Old 09-04-2008
Code:
$ date +%F
2008-09-04
$ date +%F -d '-1 day'
2008-09-03

# 3  
Old 09-04-2008
$ date +%F
2008-09-04
$ date +%F -d '-1 day'
2008-09-03

This code return the Month name(September) not "2008-09-03".
# 4  
Old 09-04-2008
Which OS ? Check if date(1) supports -d flag in man page.
# 5  
Old 09-04-2008
If your version of ksh is actually ksh93, then the following works
Code:
$ printf "%(%Y.%m.%d)T\n" "yesterday"
2008.09.03
$

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