Draft Status, Vietnam War
A man, born just after 12:00 a.m. DST, circumvented the Vietnam War draft by using a daylight saving time loophole. When drafted, he argued that standard time, not DST, was the official time for recording births in his state of Delaware in the year of his birth. Thus, under official standard time he was actually born on the previous day--and that day had a much higher draft lottery number, allowing him to avoid the draft.
A trouble with using local time, not even daylight savings time, is illustrated nicely by the two babies born around the new year...
Adam was born in NY at 1 am Eastern Time, January 1, 2017.
An hour later, Barbara was born in LA.
Barbara is legally a day older, despite being born later, as her birth was at 11 pm on December 31, 2016.