inUtc method
Implementation
ZonedDateTime inUtc() {
// Bypass any determination of offset and arithmetic, as we know the offset is zero.
// var ymdc = GregorianYearMonthDayCalculator.getGregorianYearMonthDayCalendarFromDaysSinceEpoch(epochDay);
// todo: seems a bit much -- simplify?
var offsetDateTime = IOffsetDateTime.fullTrust(LocalDateTime.localDateAtTime(LocalDate.fromEpochDay(epochDay), LocalTime.sinceMidnight(epochDayTime)), Offset.zero);
return IZonedDateTime.trusted(offsetDateTime, DateTimeZone.utc);
}