java.time offset zonedatetime

parsing-offset-names.clj

; demonstrating that offset names such as EST, CEST etc are not always parsed properly into ZonedDateTime.
; EST, CEST are defined as fixed offsets from UTC so are not ambiguous in that respect, although apparently the same abbreviation
; is used more than once for the same thing in some cases! Ideally they could be parsed to OffsetDateTime,
; but I can't find a way to get that working. Comment if you know how ;-)

; old parse api
(->
  (SimpleDateFormat. "M/d/y, H:m z")
  (.parse "3/26/2020, 14:00 EST"))

;; or even 
(Date. "3/26/2020, 14:00 EST")

;; ... correctly returns #inst"2020-03-26T19:00:00.000-00:00"

; new & improved java.time
(-> (java.time.ZonedDateTime/parse
      "3/26/2020, 14:00 EST"
      (java.time.format.DateTimeFormatter/ofPattern "M/d/y, H:m z"))
    (.toInstant)
    (java.util.Date/from))

; results in  #inst"2020-03-26T18:00:00.000-00:00". wrong!
; see https://stackoverflow.com/a/45745127/1700930 for more info
; but tl;dr I don't see DateTimeFormatterBuilder.appendZoneText as a great solution.