Hi Frank and Mark!
There's a happy accident here that applies to WEEKDAY second argument
1 using 1900 Date System
=WEEKDAY(A1)
Returns the day number where Sunday = 1, Monday = 2
This can be useful if we want to refer to the day number in a formula
(e.g. calculating weekend overtime rates). But we can format the
return dddd and it will return the day of the week in text.
Happy accident? Date serial number 1 represents 1-Jan-1900 and that
was actually a Monday. Excel, copying Lotus 1-2-3 copying.... has it
as a Sunday. The error corrects itself after Feb-28-1900 because Excel
has this as a Leap year when it wasn't. One danger here is changing to
the 1904 Date System where this formula would still return 4 but
formatting dddd would show one day earlier.
--
Regards
Norman Harker MVP (Excel)
Sydney, Australia
(e-mail address removed)
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