=WORKDAY(A1,13)

Where A1 holds the date

Read up on WORKDAY in help, it is part of the Analysis ToolPak that comes
with Excel/Office and you can set public holidays for instance in a range of
cell and include that range

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Regards,


Peo Sjoblom

"ship" wrote in message
...
Hi

How do I add (say 13) working days to an existing date?

With thanks


Ship
Shiperton Henethe