Fortunately the very thing already exists. The Roman civil calendar commences from the founding of the city (ab urbe condita) in 753BC and its year coincides with that already in general use.
It has two other advantages: it is associated with the last previous period when Europe was united ; and it postpones the millennium fuss - next year will be 2753 ab urbe condita, a wholly unremarkable number. For this alone it would be worth it.
N A WALTER
Westcliff-on-Sea, EssexReuse content