// Calendar view of an instant. Month/day start at 1; weekday is Sunday=0.
// year==0 means out of the supported calendar range (years 1 through 9999).

// All values default zero/false
struct DateTime {
    int year, month, day;
    int hour, minute, second, millisecond;
    int weekday, offsetSeconds;
    bool daylight;
};

// Factory in the defining unit, so callers need no forward instance type.
val empty = { -> new DateTime(); };