Java 8 DateTimeFormatter can not parse "Etc/GMT" time zone

Question

I am trying to use java.time.format.DateTimeFormatter to parse dates like "2017-04-03 19:16:19 Etc/GMT" and getting java.time.format.DateTimeParseException: Text '2017-04-03 19:16:19 Etc/GMT' could not be parsed at index 20

Here is how my formatter is being initialized:

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss zzz");

At the same time, if date is as follows: "2017-04-03 19:16:19 Etc/UTC", everything works great.

I checked java.time.ZoneId.getAvailableZoneIds() - String "Etc/GMT" is in the list (technically, in the Set).

Any ideas?

Question is not useful for others. Javadoc of DateTimeFormatter already shows that V is the format letter for matching named time zones, not z. Just delete the question. — Andreas
– Andreas, Commented Apr 5, 2017 at 22:56
Well, I guess I'm the only one out there who can waste a couple of hours on stuff like that... — Alexander
– Alexander, Commented Apr 5, 2017 at 22:59

Andreas · Accepted Answer · 2017-04-07 05:29:27Z

5

Use DateTimeFormatter pattern "yyyy-MM-dd HH:mm:ss VV":

V       time-zone ID                zone-id           America/Los_Angeles; Z; -08:30
z       time-zone name              zone-name         Pacific Standard Time; PST

As you can see, the V pattern will format/parse a Zone Id, like America/Los_Angeles and Etc/GMT, while the z pattern only formats/parses the Zone Name.

The V pattern must be at least 2 long, i.e. VV.

answered Apr 7, 2017 at 5:29

Andreas

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