Hi Naranyank991,

Thank you for your response!

Everything hinges on the English Launch Date (E2). This cell triggers all other cells with formulas. E2 and E14 MUST be the same date. E14 (E2) is the 'epicenter' or 'equator'. Dates above are being subtracted from E14 (E2). Dates below are being added.

=IF($D7="","",WORKDAY.INTL($E$2-D7,**0,HOLIDAYS)**) - this formal subtracts from E2 so I can back date tasks to see when we have to start to reach the launch date in time.

=IF(D16="","",WORKDAY.INTL($E$2+D16,**1,1,HOLIDAYS)**) - this formal adds to E2, so I can determine when the Spanish launch can be expected.

Hi p45cal,

Thank you for your response!

I edited the first formula you suggested, by adding the missing comma. However, it didn't change the results. I am still getting Saturday in cells E13 and E14.

So, I tried the second formula you suggested. As written, it doesn't work. The two commas together [WORKDAY.INTL($E$2-D13**-1**,**1****,,**HOLIDAYS)] throw and error. If I remove the extra comma, the formula appears to work. For example, $e$2+D19 = Saturday. However, the results show Monday, January 6th. Which is perfect.

I just can't get the top section to work. See attached updated with your formulas, sans the extra comma in the bottom section.