dateTimeNull()

// Changed on 08 十一月 2011 at 17:08:25 by Jimmy Xie
static UTCDateTime dateTimeNull()
{
    UTCDateTime utc;
;
    utc = 1900-01-01T00:00:00;
    //or utc = DateTimeUtil::parse("1900-01-01T00:00:00");
    //or utc = str2datetime( "1900/1/1 00:00:00 am",321 );
    return utc;
}