To add days to a date excluding weekends and holidays, you can use the WORKDAY function in Excel. Here's how:
[list=1][*] First, create a list of holidays in a separate range of cells. For example, you could create a list of holidays in cells A1:A10.[*] Next, enter the starting date in a cell. For example, you could enter the starting date in cell B1.[*] In the cell where you want to display the end date, enter the following formula: =WORKDAY(B1,3,A1:A10)

In this example, the formula adds 3 workdays (excluding weekends and holidays) to the starting date in cell B1, using the list of holidays in cells A1:A10.

You can adjust the formula as needed to add a different number of workdays or to use a different range of holiday dates.