How many years are there between 30 BC and 30 AD and why?

Answer 1

58 because

Answer 2

58 years are between 30 BC and AD 30.

The first thing you need to remember is that there is no year 0; the year before AD 1 is 1 BC. So the years between 30 BC and AD 30 are...

29 BC, 28 BC, 27 BC, ..., 2 BC, 1 BC, AD1, AD 2, ..., AD 27, AD 28, AD 29

29 BC through 1 BC is 29 years, and AD 1 through AD 29 is 29 years.

29 years + 29 years = 58 years