Master of electricity
Common doesn't mean it's a common date. Common just means that it is in common use and refers to how Westerners commonly use the calendar.
Which is just saying that they mean "based on BC and AD, but we figured new initials would be nice".
This does not change the fat that nothing happened in 1 CE different to 1 BCE and that there is really no reason to use them, they are just BC and AD except with less obvious meaning.