Where are you getting the 3:20 time?
The FEMA document states 2:20 p.m. ET. not 2:20 EDT.
Screenshot:
However, a google query detailed this:
Is the time zone ET or EST?
The time zone on the east coast is called Eastern Time (ET), divided into: Eastern Standard Time (EST), which is used during autumn/winter and is five hours behind UTC. Eastern Daylight Time (EDT), which is used during spring/summer and is four hours behind UTC.
Based on the above, then 2:20 EDT is meant although it seems very curious that ET was used instead of EDT particularly since the change back to EST doesn't happen until Nov. 5. I did say it seemed odd and it is.
On the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT leaving a one-hour gap. On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, which results in one hour being duplicated.
Do we really have to google everything to understand what's really going on? I appreciate your find that clarifies the actual time.