REF error on Month and Week Column

Hi All,

I followed the guidelines for importing a CSV file and preparing it on Google Drive. I then inserted the formula for calculating month and got a REF error

=arrayformula(if(row($A1:$A)=1,“Month”,iferror(date(year($A1:$A),month($A1:$A),1))))

Below is the layout of the file. The formula used is exactly like the one from Tiller and pasted above.

Hi @krismjohnson,

Can you make sure column A is formatted as a Date column and also that there isn’t any data lower in column J where you’re seeing the error. Sometimes if there’s stray data in a column where an array is trying to populate information it can’t extend to populate.

If neither of those help can you please send a screenshot of the REF error text?

Heather