I assume the reason people apply for a B2 Visa is either they wish to stay for a period in excess of 90 days on one visit or they are ineligible for a Visa Waiver. I can’t think why people would go to the trouble and expense otherwise.

Does anyone know the answer to the following:

When does the 12 month period(in which 6 months stay is permitted) of a B2 start?
e.g Is it in a calendar year(1st Jan – 31st Dec) a ‘financial year’ (1st April – 31 Mar) or if you first enter on your 10 year B2 on, say, 18th Sept does your 12 month period end on the 17 Sept for that year and subsequent years?

If you ‘use up’ your 6 months in a 12 month period can you enter again in that same 12 month period on a Visa Waiver?