I'm about to submit my thesis for examination and I'm not sure when I should give my supervisors token gifts of appreciation.

Here in Australia we don't have a viva, we just submit the thesis to two external examiners and make corrections from their reports.

My supervisors have been great and really supportive so I'm happy to get them something (have a few thoughts in mind) but I'm just not sure whether:

I give gifts at submission or after examination?

I think after examination, at least, that's what I've seen other students do in the UK.

A good time to give gifts will be after you receive the award. Until then, their job isn't done. I plan on giving my supervisor a gift when I visit the university to graduate early next year (I'm external and interstate).

I did it after passing the viva.