Is there a 0 between 1 BC and 1 AD?

The answer is nothing because there is no year 0.

1 1 1 1 0 0 1 0 F2 in hex odd parity 8 bits; 1 byte; 2 nibbles greater-than-or-equal sign in extended ASCII

It appears to be binary. Converted ASCII: h( i Converted to hex: D05040D2 Converted to decimal: 3494920402

there are no whole numbers between 0 and -1. however, there are an unlimited number of decimals and fractions.

There is an infinity of numbers between 0 and 1. In decimal form, all of then would have the representation 0.abcd...