You have to pick:

If time moves backwards how could you even tell the difference? Maybe its moving backwards right now.

Could I change the things I did in the past while time travels backward, or will I do the same things/think the same thoughts in reverse?

So...essentially, you have 41 days to walk 1,000 miles..
...which is about 24 miles a day...
Hmmmmmm would it be worth it?