What is the opposite of EOMONTH() in Power BI (DAX)

Question

What is the opposite of EOMONTH()? I am trying to find the beginning date of 12 months ago. Would it be EOMONTH(Current Date,12)-1?

Any direction would be great. TIA

Answer 1

To find the beginning of a month, go to the end of the month before and add a date to it (not sure if I understand the question)

Start of month one year ago = EOMONTH(TODAY(),-13)+1