The answer to this riddle is 'Time'

The time has come, winter is here and those yellow bears dissapars.
The time has past, as man looks back with a sigh and a tear in his eye.
As time is held, boys cross their legs but of course he toliet begs.
As time marches on, girls loose their blush and swap a comb for thir brush.
As time passes, for those held high their end is nigh.
As time ctaches up, everyone is equal when we get to the final sequel.
As time turns, without it we have flour and water, with it we have breakfast frmy daughter.
As time revolves, how does one turn water and wine into something so fine.
As time runs out, the more in a minute you try and squeeze the less you can do with ease.
As time ticks, all the time hat has past, man can nt comprehend, something so vast.

- I can remember learning this in primary school.