From English Wikipedia @ Freddythechick
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HAT, AKT, PT, MT, CT, ET, AT, NT
- DST begins on the second Sunday in March at 2 a.m. local standard time and ends on the first Sunday in November at 2 a.m. local daylight saving time ([1][2][3]).
- 2 a.m. HAST, AKST, PST, MST, CST, EST, AST and NST is 12:00, 11:00, 10:00, 9:00, 8:00, 7:00, 6:00 and 5:30 UTC respectively.
- 2 a.m. HADT, AKDT, PDT, MDT, CDT, EDT, ADT and NDT is 11:00, 10:00, 9:00, 8:00, 7:00, 6:00, 5:00 and 4:30 UTC respectively.
WET, CET, EET
- DST begins on the last Sunday in March at 1:00 UTC and ends on the last Sunday in October at 1:00 UTC ([4]).
ACT, AET
- DST begins on the first Sunday in October at 2 a.m. local standard time and ends on the first Sunday in April at 3 a.m. local daylight saving time ([5][6][7]).
- 2 a.m. ACST and AEST is 16:30 and 16:00 UTC (previous day) respectively, which is an offset of 7:30 hours and 8:00 hours respectively from midnight.
- 3 a.m. ACDT and AEDT is 2 a.m. ACST and AEST is 16:30 and 16:00 UTC (previous day) respectively, which is an offset of 7:30 hours and 8:00 hours respectively from midnight.
NZT
- DST begins on the last Sunday in September at 2 a.m. local standard time and ends on the first Sunday in April at 3 a.m. local daylight saving time ([8]).
- 2 a.m. NZST is 14:00 UTC (previous day), which is an offset of 10:00 hours from midnight.
- 3 a.m. NZDT is 2 a.m. NZST is 14:00 UTC (previous day), which is an offset of 10:00 hours from midnight.
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