Month in year.
Month in year. Note: this counts from zero (January) to eleven (December).
This is a fractional value, such as 2.54,
which can be truncated using .floor.
The precision is 0.5 days due to a simplification that
bases the year on 365.2422 days. It is positively biased
so that .floor should always give the correct month for
January 1st.
Year.
Year. This is an absolute fractional value, such as 1990.2,
which can be truncated using .floor.
The precision is 0.5 days due to a simplification that
bases the year on 365.2422 days. It is positively biased
so that .floor should always give the correct year for
January 1st.