Microsoft Excel – finding process date using working days from end date

If I have a date in which an order has to be sent and I know the number of working days that it takes me to process the order, I may want to find out when I need to start processing it.


I can use the WORKDAY function for this. WORKDAY has the syntax:

=WORKDAY(start date, days, [holidays]), – if we want to include holidays we should include these by inputting them somewhere on our worksheet and selecting the relevant range.

Usually this function is used to find a future date; here we need to use it to find an earlier date.

So my formula in cell c2 becomes:

=WORKDAY(a2,-b2)       In this case I am not selecting holidays.


This shows the result as a number – the number of days since 01/01/1900.

On the Home tab, in the Number group, from the dropdown, select Short Date. This then shows the date at which I need to start processing the order. Double-click down to get the rest of the required start dates.


Find out more about our Microsoft Excel training London, UK or our Microsoft Excel training Dorset, Hampshire, Wiltshire.

Find out more about our Microsoft Excel training Sydney, Australia.


About jdonbavand

I am a trainer of Microsoft Office, Microsoft Project and Crystal Reports. I have called my blog "If Only I'd Known That...." because I hear it so many times in training sessions. In fact, if only I had a £100 (or 150 Aussie dollars)for every time someone says "If only I'd known that." ....
This entry was posted in Microsoft Excel, Microsoft Excel 2003, Microsoft Excel 2007, Microsoft Excel 2010, Microsoft Excel 2013, Microsoft Excel 2016, Uncategorized and tagged , , . Bookmark the permalink.

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