You'll have to take each individual piece of your timestamp, and convert it into Unix time. For example for the timestamp, 2009-09-12 20:57:19.
(((2008-1970)*365)+(8*30)+12)*24+20 would give you a ROUGH estimate of the hours since January 1st, 1970.
Take that number, multiply by 60 and add 57 to get the minutes.
Take that, multiply by 60 and add 19.
That would convert it very roughly and inaccurately however.
Is there any reason you can't just take the normal Unix time to begin with?
