One of the things the discussion about birthdates points out: it really
depends where your family lived. Russia and 'the East', generally had
little knowledge of birthdates (of course, there is a lot of variation-some
knew the year and the Jewish date, some knew the Jewish date, etc.). In
Germany, where M. Bernet's ancestors came from, civil registration started
very early-some places in the 1700's. Where the Bruckheimer family came
from (now in Baden, but then the property the Electorate of the Main), civilregistration started in 1871 with the formation of the country 'Germany'.
If they were in Baden before that, they would have civil registration in
So, like so many things, you have to consider exactly where your family
lived in the year of the event.