For the sake of humans reading your code I'd be more explicit and give that 1 some units.
rng default
t = datetime('today')
v1 = t + caldays(randi([-7 7], 1, 5))
v2 = v1 + caldays(randi([-1 1], 1, 5))
The fourth and fifth elements of v2 are 1 day after the corresponding elements of v1.
isOneDayLater = v2 == (v1 + caldays(1))
Why do I use caldays instead of just days?
daylightSavingsTimeStarts = datetime(2022, 3, 13, 'TimeZone', 'America/New_York')
daylightSavingsTimeStarts + days(1) % a 23 hour long day
daylightSavingsTimeStarts + caldays(1)
days(1) represents 24 hours. caldays(1) represents one calendar day, no matter how many hours that calendar day contains. That could be 23 hours, 24 hours, or 25 hours.
datetime(2022, 11, 6, 'TimeZone', 'America/New_York') + days(1) % DST ends
