I have the following know pair of hex values and dates:
7D 92 D2 5C = 26/03/2009 - 09:28 7D 92 DA CC = 27/03/2009 - 11:12 7D 92 E3 56 = 28/03/2009 - 13:22 7D 92 E
It's a simple bitfield, even though that's a pretty weird time format :)
1111101100100101101001001011100 011100 - 28 minutes 01001 - 09 hours 11010 - 26 days 0010 - month 3 (zero-based, hence 2) 11111011001 - 2009 years
would be my guess.