<P>Only millisecond precision is possible for this method.
*/
public static DateTime now(TimeZone aTimeZone) {
TimeSource timesource = BuildImpl.forTimeSource();
return forInstant(timesource.currentTimeMillis(), aTimeZone);
}
/**
Return the current date.
<P>As in {@link #now(TimeZone)}, but truncates the time portion, leaving only year-month-day.