Year zero does not exist in the Anno Domini (AD) system usually used to number
years in the Gregorian calendar and in its predecessor, the Julian calendar. In
this system, the year 1 BC is followed by AD 1. .... So the year before 1 AD is
designated 0, the year before 0 is −1, and so on. The letters "AD", "BC", "CE, or "
0-1 year olds physical development - Kidspot
Jul 4, 2017 ... Physical development for 0-1 year olds. Physical development comes thick and
fast at this age – one minute you have a smiling slug of a baby ...