This is the year 2013, implying that this is 2 thousand + years since ? Birth of Christ? ( which was supposedly in BC 5) So if this year 2013 is AD yet Christ died in 33 AD, how does this time scale relate to the geologic time scale?
Contrary to popular belief, AD doesn't mean After Death of Christ. AD stands for Anno Domini, which is latin for "Year of our Lord." Since Christians believe Jesus is the Christ (greek for savior) and was raised from the dead and now lives forever, we are still in the years of our Lord, and that will end at the Second Coming. Most scholars put the year 0 AD as the year of Jesus' birth, which would be in the 3rd year of the reign of Octavian Augustus according to the narratives in the Gospels of Luke and Matthew. BC still means Before Christ.
If you ascribe to old Earth theory, BC and AD combined are less than a mm on a geologic timeline stretching across the page of a textbook. Human history compared to geologic time is very short.