Previous month function that takes January into consideration

[Anni_E_Lehtinen]

Hi!

I have been trying to figure out a previous month- DAX function that takes into account that in January previous month's year is not the same as the current month's year. 

I am currently using this and this does work when it is not January:

IsPreviousMonth = IF(AND(MONTH(MarketingMonthly[Date]) =MONTH(TODAY()) -1,YEAR(MarketingMonthly[Date]) =YEAR(TODAY())),"Previous","Other")

However, in January it will be broken since previous month's year should be year -1 and not the current year.

Does anybody know how to do this? Thank you in advance!

[sdjensen]

Add an IF to the calculation that check if the month is january - if true handle the calculation differently else do what do now.

[Anni_E_Lehtinen · Accepted solution]

Thanks @sdjensen! I actually just figured this out like this:

IsPreviousMonth = IF(MarketingMonthly[YearMonth]=FORMAT(DATE(YEAR(TODAY()),MONTH(TODAY())-1,DAY(TODAY())),"YYYY/MM"),"Previous","Other")

Problem solved 🙂