That calendar adjustment is interesting. The Julian calendar drifts from the true tropical calendar by 0.00781 days per year or about 1 day every 128 years. The adjustment was 11 days, meaning that 11*128=1408 years had elapsed since the Julian started in 45 BC. Making the year of the reform 1363 AD, not 1752. The council of Nicea is mentioned, but they only noted the calendar problem, they did not try to fix it. If that's the case then we are actually living in the 17th century, around 1677.