POTUS often uses just an 'E' to denote timezones , in this case EDT
>tl;dr not a missing E
wiki link , but whatever
> could dig further , but meh
instead of asking questions , why don't you use the internet to help answer your questions
"English colonial government militias: since December 13, 1636"
"As "National Guard": since 1824 in New York, since 1903 nationwide"
"Dual state-federal reserve forces: since 1933"
https://en.wikipedia.org/wiki/United_States_National_Guard