Formula to always pull previous months data

IJH34

I am looking for a formula that will return data from the previous month. I know I could use a simple filter tool and define my dates each month, but I would like to automate the process so it's always looking back at the previous months data. 

Example: Today is 6/6/2018, I would like all data from 5/1/2018-5/31/2018

In 2 months (8/6/2018), I would like data from 7/1/2018-7/31/2018

Nate1

That formula doesn't account for the year of the data so it will take take from the previous month of last year too. It won't work during January either when the current month is 1 - previous month 12. 

Here is another formula I tried that should work for those situations.

[date] <= ToDate(DateTimeAdd(DateTimeFirstOfMonth(), -1, "days")) 
and [date] >= ToDate(DateTimeAdd(DateTimeFirstOfMonth(), -1, "months"))