A.D. does not mean After Death it stands for the Latin “Anno Domini” which means “In the year of our Lord” so the minute Jesus was born we were in A.D.
Yes, exactly.
I'm saying the modern system is flawed at its very core.
There is NO Biblical authority for the time, day or even the year of His birth. If God thought it was important that we mark His birth, the Bible would provide enough information to determine it.
By contrast, we can precisely set the death on the cross and the dawn of resurrection.
THAT was when we were supposed to set the start of the Christian era. The very moment when Salvation became a global possibility, rather than limited to the few Jesus personally touched.