Can anyone tell me how to caluculate the last day of the prior month using getdate() ?

The function will be hardcoded in a query that will run on either of the 1st 7 days of the month - Specifically the the 1st through the 7th day of the following month, for every month of the year.


Thanks in advance for any help.

select dateadd(dd,-1,dateadd(mm, datediff(mm,'20000101',getdate()),'20000101'))