Astronomers of course have the best solution - just count days.
Bc and ad dating system
But moreover, there is only one letter of difference between the two terms, whereas with BC and AD, the terms are clearly different and I find it easier to distinguish! BCE/CE usually refers to the Common Era (the years are the same as AD/BC).
Most organizations and political entities, for the sake of convenience, have adopted the Western calendar, but "Anno Domini"/"Before Christ" are meaningless terms.
Modern dates are understood in the Western world to be in the Gregorian calendar, but for older dates writers should specify the calendar used.
Dates in the Gregorian calendar in the Western world have always used the era designated in English as Anno Domini or Common Era, but over the millennia a wide variety of eras have been used with the Julian calendar.
Despite the rise of science, Christians have used—and many times have insisted upon—the continued use of the labels “AD” and “BC” to designate calendrical years, and thereby portray human history as directly relative to the birth of Jesus of Nazareth.