Constructs a Date from year-month-day, another Date, or a YearMonth or YearQuarter with optional period assumptions.
auto d1 = Date(YearMonth(2020, Month.may)); auto d2 = Date(YearMonth(2020, Month.may), AssumePeriod.end);
Constructs a Date from year-month-day, another Date, or a YearMonth or YearQuarter with optional period assumptions.