import datetime
import time

starttime = time.mktime( time.strptime("28-04-2006 14:30:23",
                                       "%d-%m-%Y %H:%M:%S") )
durations = [25702, 11245, 8462, 32990, 21601, 3965, 10381]

times = [ starttime ]

for duration in durations:
    times.append( times[-1] + duration / 1000.0)

for time in times:
    try:
        print time, datetime.datetime.fromtimestamp(time)
    except ValueError, e:
        print "Error converting %.8f" % time
        print e