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Published 20 hours ago • verified publisher icon OpenEVSE

Timezone Issues

Open glynhudson opened this issue 5 years ago • 2 comments

Selecting Europe/London timezone and NTP results in the correct time being set on the WiFi interface and on the controller :+1:

IMG_0154

However, selecting GMT+1 which should be same, results in the correct time being displayed on the WiFi interface, however the controller is 2hrs behind :-1:

Could a solution just be to remove the GMT+X timezones? Since these seem to be a duplicate of the Continent/City timezones.

IMG_0153

Thanks to Bill for reporting on the forum:https://community.openenergymonitor.org/t/can-openevse-default-be-set-to-eco-mode/11278/14

I've also noticed that the timezone dropdown menu does not work on iOS, tested on both iOS Chrome and iOS Safari on an ipad mini:

IMG_0152

glynhudson avatar Aug 07 '20 10:08 glynhudson

On my iPhone 8 on Chrome it works image

slavkobrzeg avatar Sep 05 '20 06:09 slavkobrzeg

tl;dr: I think the "polarity" of the Etc/GMT selections may be reversed.

My timezone (near Seattle, Washington, USA) is nominally

  • Winter months: PST (Pacific Standard Time: GMT-8)
  • Summer months: PDT (Pacific Daylight Time: GMT-7)

From the provided drop-down, things seem to work correctly if I select:

America/Los Angeles

However, selecting

Etc/GMT-7

is off by 14 hours: instead of subtracting 7 hours from GMT, it adds 7 hours. Selecting

Etc/GMT+7

Works correctly. I think the "polarity" of the Etc/GMT selections may be reversed.

alsavage avatar Aug 28 '22 02:08 alsavage

Regarding the Etc time zones they are defined that way: https://data.iana.org/time-zones/tzdb/etcetera. Probably we should just remove them from the GUI (@KipK can you look at this in the v2 UI?), I don't think they are needed in practice. Also see https://stackoverflow.com/questions/53076575/time-zones-etc-gmt-why-it-is-other-way-round

Whilereviewing this, I have however found a few issues and will be submitting a PR shortly

jeremypoulter avatar Mar 11 '23 15:03 jeremypoulter

ui2 use same posix_tz_db git source for timezone list. I can filter out the ETC ones yes. Or do we have a better source ?

KipK avatar Mar 11 '23 16:03 KipK

It nows filter Etc/... tz on the time setting. Pushed in master

KipK avatar Mar 11 '23 16:03 KipK

Also see https://stackoverflow.com/questions/53076575/time-zones-etc-gmt-why-it-is-other-way-round

Thanks for this!

alsavage avatar Mar 11 '23 21:03 alsavage

@KipK the source is 'correct' and to the spec, it is the spec that may not make sense ;-)

jeremypoulter avatar Mar 11 '23 21:03 jeremypoulter