@maxlovesmarie,
The answer is
Time
The time has come,
winter is here
and those yellow bears disapear.
(I turn polar bears white )
The time has past
as man looks back with a sigh
and a tear in his eye.
(...and I will make you cry.)
As time is held
boys cross their legs
but of course the toilet begs
(...I make guys have to pee)
As time marches on
Girls loose their blush
and swap a comb for their brush
(...and girls comb their hair.)
As time passes
For those held high
their end is nigh
(...I make celebrities look stupid )
As time catches up
Everyone is equal
when we get to the final sequal
(...and normal people look like celebrities.)
As time turns
Without it we have flour and water
With it we have breakfast for my daughter
(...I turn pancakes brown )
As time revolves
How does one turn water and wine
into something so fine
)...and make your champane bubble.)
As time runs out
The more in a minute you try and squeeze
the less you can do with ease.
(...If you sqeeze me, I'll pop. )
As time ticks
All the time that has past
man cannot comprehand something so vast.
(...If you look at me, you'll pop. )