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I have a column full of datetime values in a Google Spreadsheet.

I want to get a count of how many unique days there are. As in 8pm and 7pm today would count as 1. Tomorrow at 9pm, 3pm and 4pm would also count as 1.

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migrated from stackoverflow.com May 28 '12 at 6:05

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1 Answer

up vote 2 down vote accepted

Assuming your dates are in A1:A30, the following array formula worked for me:

=ArrayFormula(COUNTUNIQUE(TEXT(A1:A30,"yyyymmdd")))
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