I don't have any trouble filtering a date range that includes times. Simply choose Date Filers>Between and input the range. Since dates are integers and times are decimals, you just need to be careful about how you specify the range. For example, if you input just 10/10/2015 as the start date, 10/10/2015 11:12 is after that. So, filtering for dates after 10/10/2015 would mean starting after 10/10/2015 23:59:59 (or starting on 11/10/2015).

If you want to filter according to time values, use a separate column to extract just the time portion (eg =MOD(A1,1)), then filter that column.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]