Calculate on date formats

[Panpi_Daguerre]

Hello Airtable community ! :grinning:
I am once again asking for your advice.
My problem is that want to remove a month on my date formula which is :
UPPER((DATETIME_FORMAT({Date}), “MMMM”))

So my result looks like this “FEBRUARY” but i want my result to be -1 month so if the date is FEBRUARY, i want it to be JANUARY. I don’t know how to do that can somebody help me ? :thinking:

[augmented · Accepted solution]

Replace {Date} with DATEADD({Date},-1,‘month’)

Good luck!