DST in the USA 2018
Begin: March-11, 2018, @2 am (clocks will be advanced 1 hr).
End: November-4, 2018 @3 am.
Arizona has no DST. During summer Arizona has the same time as California, in winter it has the same time as Colorado.
DST 2018 in Western Europe: e.g. Germany, Austria, Switzerland
Begin: March-25, 2018 @2 am.
End: October-28, 2018.
DST New Zealand, Australia:
Since NZ & Australia are located in the southern hemisphere, DST is ‘kind of’ reversed:
2018: DST ends on 1-April 2018 and starts again on 30-September 2018
2019: DST ends on 7-April 2019 and starts again on 29-September 2019