Ok, this might seem a bit far fetched but I'll ask it any way.

The big bang occurred about some 13 billion years ago. And time is affected by gravitation and speed. I guess it is fair to say that the gravitational conditions in the early universe where different from the present. (so the rate of time changes over those 13 billion years).

now here is my question, is time dilation due to gravity and speed taken into account in those 13billion years?
Secondly what would the difference be with or without the time dilation effect (assuming the current rate of time a sea level)?

thanks in advance, Steve

As I understand it, time dilation due to changes in the overall density of the
Universe and speed of cosmic expansion doesn't need to be taken into account
because it affects everything in the Universe pretty much the same. There
is no better clock than the one that reads 13.7 billion years. All clocks,
everywhere in the Universe, unless they are close to a black hole, will read
about 13.7 billion years. That age might be off, but it wouldn't be because
of time dilation.

As a bit of trivia, I recently figured that a clock at Earth's surface for the
entire history of the Universe would read about six years less than a clock
in independant orbit of the Sun, at the same distance from the Sun as the
Earth is. Six years, of course, is far, far less than the probable error of the
13.7 billion year figure, so really means nothing.

-- Jeff, in Minneapolis

__________________
http://www.FreeMars.org/jeff/

"I find astronomy very interesting, but I wouldn't if I thought we
were just going to sit here and look." -- "Van Rijn"

"The other planets? Well, they just happen to be there, but the
point of rockets is to explore them!" -- Kai Yeves

Astronomers adopt co-moving coordinates to most easily relate issues of space and time in the expanding universe, which is I think what Jeff Root is referring to. You might also find this link to be interesting.