What time did Jewish sabbath begine on 3 April 2011?

Answer 1

The Sabbath begins some number of minutes before local sunset, typically

between 15 and 60 minutes before, the exact number varying somewhat

depending on the custom of the local Jewish community.

Since the time of local sunset varies by location, the beginning of the Sabbath

on any given date depends on the location, and on the custom of the community

of which the individual Jew is a member.