Written by Allen Wyatt (last updated November 25, 2023)
This tip applies to Excel 2007, 2010, 2013, 2016, 2019, 2021, and Excel in Microsoft 365
Ernest needs either a formula or a macro to first determine the Nth Sunday of the year (let's say the 23rd Sunday of the year) and then return the name of the month in which that Sunday occurs. He's at a loss as to how such a formula or macro would be constructed.
This task could be accomplished with a macro, but it is very easy to accomplish with a formula, so we'll go with that route. Since Excel uses serial numbers for dates, it makes it very easy to do the math necessary to figure out such things as the Nth Sunday.
The trick to figuring out the proper formula is to figure out the last Sunday of the previous year. (Yes, the last Sunday.) This can be done in any number of ways, but here is a good method, assuming that the four-digit year you want is stored in cell A1:
=DATE(A1,1,1)-WEEKDAY(DATE(A1,1,1)-1)
This works because the WEEKDAY function, by default, returns a value of 1 through 7 (Sunday through Saturday). Let's say, for instance, that the year in A1 is 2019. This means that WEEKDAY will return the value 3 for January 1, 2019, meaning that it falls on a Tuesday. Subtract 1 from that, giving you 2, which you then subtract from the actual date for January 1. The result is the date of the last Sunday in 2018, which is December 30.
With that date in hand, all you need to do is to multiply the number of the Sunday desired (let's say that is in cell B1) by 7. Add it to the date calculated above, and you have the date of the Nth Sunday in the desired year:
=(DATE(A1,1,1)-WEEKDAY(DATE(A1,1,1)-1))+(B1*7)
At this point you have two options. One is that you can apply a custom format to the cell in which the above formula is located. Using a custom format of "mmmm" will show the result as a full month name. I tend to prefer the alternative option, which is to wrap the entire formula in the TEXT function, in this manner:
=TEXT((DATE(A1,1,1)-WEEKDAY(DATE(A1,1,1)-1))+(B1*7), "mmmm")
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2023-11-27 10:48:48
J. Woolley
My Excel Toolbox includes the following function to return the date of the Nth weekday of a month for a year:
    =NthWeekdayOfMonth(NthNbr, DayNbr, MonthNbr, YearNbr)
For the Tip's example (23rd Sunday of 2019) set NthNbr=23, DayNbr=1 (Sunday), MonthNbr=1 (count from the beginning of the year), and YearNbr=2019 (must be greater than 1899). So with A1=2019 and B1=23, this formula returns the month (June):
    =TEXT(NthWeekdayOfMonth(B1,1,1,A1),"mmmm")
See https://sites.google.com/view/MyExcelToolbox/
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