Another related hint to the vagaries of time in point 4 above -- years changed their start-date at various times, over the space of about 200 years, within Euro

Another related hint to the vagaries of time in point 4 above -- years changed their start-date at various times, over the space of about 200 years, within Europe. For example, if you were in England in February 1750, two months later it would be April 1751. This has lots of wonderfully weird knock-on effects while tracing your ancestors' history in that region. https://en.wikipedia.org/wiki/New_Year%27s_Day#Acceptance_of_1_January_as_New_Year%E2%80%99s_Day https://en.wikipedia.org/wiki/New_Year%27s_Day#Acceptance_of...