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Find one month before date

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# 1  
Old 11-04-2014
Find one month before date
Hi,

I want two dates one will be the current date and the other one will be just one month before. Say if current month is 11/4/2014 then the other date should be 11/3/2014.
Code:
#!/bin/ksh
currentDtae=`date`
oneMonthBefore= ?

I dont know how to do it. Went through some of the related threads but couldn't find anything clear.

Can anyone please suggest?
# 2  
Old 11-04-2014
Hello Sharma331,

Could you please try following command.

Code:
DATE_1_MONTH_BEFORE=`date -d "1 month ago"`
echo $DATE_1_MONTH_BEFORE
Sat Oct 4 04:44:57 EDT 2014

Thanks,
R. Singh
# 3  
Old 11-04-2014
Hi Ravinder,

I have already tried it but it does not recognise the flag d. Smilie
# 4  
Old 11-04-2014
Hello Sharma331,

Could you please use following. Also as a good practice always let us know the os you are using, it will help us too.

Code:
date --date='-1 month'
Sat Oct  4 05:08:29 EDT 2014

Thanks,
R. Singh
# 5  
Old 11-04-2014
can we do something like:
Code:
if[current month is january] then
subtract 1 from the year and make the month as 12;
else
subtract one from the month;
fi

Is this logic possible?

---------- Post updated at 04:13 AM ---------- Previous update was at 04:11 AM ----------

Quote:
Originally Posted by RavinderSingh13
Hello Sharma331,

Could you please use following. Also as a good practice always let us know the os you are using, it will help us too.

Code:
date --date='-1 month'
Sat Oct  4 05:08:29 EDT 2014

Thanks,
R. Singh
This is also not working. Smilie I don't know why these flags are not recognized.
# 6  
Old 11-04-2014
Hello Sharma331,

Kindly always let us know the Operating system you are using and what you have tried so far to solve the problem, it will always help us too. I am assuming it is solaris, following is the link which may help you in same. Also search option in the forum is very useful you can try the same too.

print previous month (current month minus 1) with Solaris date and ksh


Thanks,
R. Singh
# 7  
Old 11-04-2014
Hi,

I tried below link. It gives me output but little weared.
How to get date n months before in Unix?

Actually my requirement is not this complicated. It doesn't bothers me weather the month is of 28 days or 30 days or 31 days.
What i want is if my current date is 2014-02-02 then the date i want is 2014-01-02 which is in format yyyy-mm-dd.
Just want to subtract 1 from the month thats it.
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