dt1:         2016080100:00:00 (   2016-08-01-00:00:00CDT)
dt2:         2016123100:00:00 (   2016-12-31-00:00:00CST)
                  -> 0:0:21:5:1:0:0
dt1:      2016080100:00:00GMT (   2016-08-01-00:00:00GMT)
dt2:      2016123100:00:00GMT (   2016-12-31-00:00:00GMT)
                  -> 0:0:21:5:0:0:0
dt1:      2016080100:00:00CDT (   2016-08-01-00:00:00CDT)
dt2:      2016123100:00:00CST (   2016-12-31-00:00:00CST)
                  -> 0:0:21:5:1:0:0
dt1:      2016080100:00:00CST (   2016-08-01-00:00:00CST)
dt2:      2016123100:00:00CST (   2016-12-31-00:00:00CST)
                  -> 0:0:21:5:14:0:0
dt1:   2016-08-01T00:00:00CST (   2016-08-01-00:00:00CST)
dt2:   2016-12-31T00:00:00CST (   2016-12-31-00:00:00CST)
                  -> 0:0:21:5:14:0:0
dt1: 2016-08-01T00:00:00-0500 (   2016-08-01-00:00:00CDT)
dt2: 2016-12-31T00:00:00-0500 ( 2016-12-31-00:00:00EASST)
                  -> 0:0:21:5:0:0:0