Don't create your own date data type; you'll get yourself into trouble. Use the built-in one.
You can use the WORKDAY() and NETWORKDAYS() functions to exclude weekends, holidays etc.
Look in HELP for details.

If you don't have these functions available:

ToolsAdd-ins, check Analysis Toolpak

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Kind regards,

Niek Otten
Microsoft MVP - Excel

"briancarroll101" wrote in message
...
|I wish to plan dates when certain actions in a project are due for
| completion. Project is not suitable for my needs as i am creating a
| spreadsheet with several types of information. The problem is that i wish to
| either modify the calendar used in excel so as to exclude weekend days, bank
| holidays and several days over the christmas period and do not know how to do
| this. Alternativly I could create a new data type much like the one uesd for
| caluclating dates in excel where a value is attributed to each date and
| unnecessary days could just be skipped and not given a value.
| Anyone know how i could implement either of these approaches?
| Thanks