Help with getting last date of previous month and first date of previous 4th month from current date


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# 1  
Help with getting last date of previous month and first date of previous 4th month from current date

I have requirment to get last date of previous month and the first date of previous 4th month:

Code:
Example:
Current date: 20130320 (yyyymmdd)
Last date of previous month: 20130228 (yyyymmdd)
First date of previous 4th month: 20121101 (yyyymmdd)

In my shell --date, -d, -v switches are not working for the date commandSmilie

Please help!!Smilie
# 2  
It's not straight forward in unix..!

If you have a "DB" ( oracle/mysql ) you can do it easily.

Check the below link to see how to do it in perl:

Code:
http://stackoverflow.com/questions/9950193/how-can-i-get-the-first-and-last-day-of-the-month-with-perls-datetime

# 3  
# 4  
1st of Last Month:

Code:
ksh -c  'printf "%(%Y-%m-%d)T\n" "1st last month"'

Last of Previous Month:

Code:
ksh -c  'printf "%(%Y-%m-%d)T\n" "final last month"'

1st of Previous Month:

Code:
ksh -c  'printf "%(%Y-%m-%d)T\n" "1st last month"'

Last of Previous Month:

Code:
ksh -c  'printf "%(%Y-%m-%d)T\n" "final last 1 month "'

1st of two Months from today's Month:

Code:
ksh -c  'printf "%(%Y-%m-%d)T\n" "1st last 2 month  "'

Last of two months from today's date:

Code:
ksh -c  'printf "%(%Y-%m-%d)T\n" "final last 2 month "'

and so on....
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