When did time start? -DM Depends. For each of us, it started the
  moment we have memories. Time also starts every morning we wake
  up. Some say time began at the start of the Big Bang. Some say
  time began the moment God said, "Let there be light". Both have
  a concept of some eternal "something" beforehand that was
  timeless, whether it be universal laws of mathematics or God -
  take your pick. Some say Time is eternal. There was never a
  beginning or end but cycles or perhaps one united "whole". If
  one wants to speak of "before Time", then all that's left is the
  Platonic realm or something similar to it: a perfected 'place'
  of changeless forms and perfections. Many religious people put
  Gods and heavens there. Astrophysicists put Math there. When we
  speak of "ideas", we put "ideas" there, especially nouns with no
  tangible connection to reality such as "Love" or "Hope" and
  such, as opposed to active verbs with subjects (and perhaps
  objects) like "Loving" or "hoping". So, there ya go. Top of
  head. Good question.