日期范围内的天数-Excel

Question

I am new to excel and been struggling to find a way to get ( count ) the number of dates (ie 14 ) from a cells range (ie B1:B12 ) considering that every cell has different date that not in sequence with the one in next cell.

Thanks.

EDIT:

Sorry I forgot to mention that I have time included with the date in each cell like the following:

Row: 1/2/2013 12:00:00 pm,1/2/2013 10:00:00 pm,5/9/2009 5:00:00 pm,1/2/2013,4/10/2013 1:00:00 am I need a way to get number 3 for that row.

Answer 1

Try this

=SUM(IF(FREQUENCY(B2:B12,B2:B12)>0,1))

Reference:

http://office.microsoft.com/en-us/excel-help/count-occurrences-of-values-or-unique-values-in-a-data-range-HP003056118.aspx

Edited:

Yes, according to comment from @barry, you can use int to drop the time, but you need to enter it as an array formula

{=SUM(IF(FREQUENCY(INT(B2:B12),IF(B2:B12<>"",INT(B2:B12)))>0,1))}