Excel: Convert a string into date - hour

Hey guys, I need some help. I have 2 separated cells with these STRINGS, indicating date and hours: Apr-14-14 00:31:41 Apr-15-14 00:29:41 I would like to calculate, in a third cell, the difference between the 2 date/hours (in seconds). How can I convert these 2 string cells into a date + hour format, so that I can compute the difference? My version of Excel is 2013. Thank you.

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This thread is current as of April 16, 2014.

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