Differences between string representations of date/times

Question

In Excel 2007, I want the differences for the following string date/times:

  A                         B                          C
1 Date1                              


        

Answer 1

A rather long-winded way to calculate zero (for the examples):

=SUBSTITUTE(LEFT(A2,10),".","/")+MID(A2,12,8)+RIGHT(A2,4)/86400000-(SUBSTITUTE(LEFT(B2,10),".","/")+MID(B2,12,8)+RIGHT(B2,4)/86400000)  

By special request and very slightly shorter:

=SUBSTITUTE(LEFT(A2,10),".","/")+REPLACE(RIGHT(A2,13),9,1,".")-(SUBSTITUTE(LEFT(B2,10),".","/")+REPLACE(RIGHT(B2,13),9,1,"."))