Initializing boost date to the first year of AD

Question

I would want to initialize a gregorian date like this

boost::gregorian::date d = { 1, 1, 1 };

but year = 1 is not allowed. How can I create a day before Jesus was born ?

Answer 1

The current implementation of Gregorian date supports dates in the range 1400-Jan-01 to 9999-Dec-31. So handling a date outside this range is no directly possible.