I start at four and move to two and then at dawn I move by three. What Am I?

I'll never know, I haven't got up that early in years!

Man.

But what if I never need a cane? :D

The sun?

A person.
Start at 4: crawling
Move to 2: walking
Then at dawn 3: walking with a walking stick

No idea??

We give up, tell us already... he he he