Does maintaining your home's time zone, while travelling, enable you to evade jet lag?

I don't see you avoiding a timezone difference for fourteen weeks, even a small one.

What happens when your client/friend invites you to dinner that turns into a night out? Or you have to be up early for some ill-timed meeting/whatever it is tourists do before 11 am? Your whole system has gone to pot. (Okay maybe a tourist can do this if she really never has any pre-lunch commitments.)

For most people a few hours is not really a difficulty anyway, it's not much difference to having a late night or an early morning in your normal time zone. It's the ±>8 hours that really makes things difficult, but it's very hard to keep your sleep schedule the same when you are going to be ±8 hours out of sync with everyone and everything else.

On the daylight and natural light front, personally I don't think it makes any difference to my sleep cycle, given that I spend most of the waking day bathed in artificial light and in the winter arrive at work before dawn and leave after sunset. But that is my own observation.