Yes, I was generalizing the expression for the OP, as per Roger's line:
I would think Max was generalising, in case the OP tried it for January as
well, as all blank cells would then be counted (00 Jan 1900)

But perhaps I should have explained it in the response itself for
completeness. Roger, thanks for that favour!
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Max
Singapore
http://savefile.com/projects/236895
xdemechanik
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