This reminds me of the strange fact that the New Year used to be considered to be March 25th, so for a while people wrote dates in the months of January through

This reminds me of the strange fact that the New Year used to be considered to be March 25th, so for a while people wrote dates in the months of January through March with 2 years like "10 January 1708/09" to resolve the ambiguity. https://en.wikipedia.org/wiki/Dual_dating https://en.wikipedia.org/wiki/Dual_dating