Problem:

Column A contains dates formatted as \"mm/dd/yyyy\".
When using the following COUNTIF formula to count the number of dates after April 1st, 2005:
=COUNTIF(A2:A6,\">\"&--\"04/01/05\")
A false result of 4 was returned.

Solution 1:

To avoid any format related problems, use the COUNTIF and DATE functions as shown in the following formula:
=COUNTIF(A2:A6,\">\"&DATE(2005,4,1))

Solution 2:

Use the COUNTIF function as shown in the following formula:
=COUNTIF(A2:A6,\">\"&--\"2005-04-01\")