mher/flower — pull request #150 by regisb (2013-11-20 14:16:41+00:00)
Title: Correctly handle time_start task attribute

time_start does not refer to the absolute UNIX timestamp, but rather to
the time elapsed "since an unspecified Epoch". For further details:

http://stackoverflow.com/questions/20091505/celery-task-with-a-time-start-attribute-in-1970
http://linux.die.net/man/3/clock_gettime