UI - Status page - Current time should be local time, not UTC time

[brunetton]

Device

itead-sonoff-dual-r2

Version

1.16.0-dev.git7536a6ed+github240615

Bug description

Time displayed in UI is UTC time, not local time

Steps to reproduce

Context

• I'm living in France; timezone is now summer time (CEST, ie UTC+2)
• local time is 00:04 (yes I should go to bed)

Steps

• in console logs I can see

  [421878] [NTP] Server    pool.ntp.org
  [421880] [NTP] Last Sync 2024-06-19 22:04:32 (UTC)
  [421880] [NTP] UTC Time  2024-06-19 22:04:32
  [421881] [NTP] Local Time 2024-06-19 23:04:32 (CET)
  

  => that's correct: current time is 23:04 CET
• when opening device UI, "Current time" is 2024-06-19 22:04:32

That is not correct, it should be either:

• 2024-06-19 22:04:32 UTC
• or better: 2024-06-19 23:04:32 CET

Note

I'm not asking for summer time support in Espurna, I can manually manage this in my schedules

get ntpTZ
> ntpTZ => "CET"
+OK

Build tools used

No response

Any relevant log output (when available)

No response

Decoded stack trace (when available)

No response

[mcspr]

2024-06-19 22:04:32 UTC
or better: 2024-06-19 23:04:32 CET

What about explicit offset then? Currently, there is none

2024-06-19 22:04:32

Commit above adds +HH:MM offset at the end for the status page

2024-06-19 22:04:32 +01:00

Internally, this looks slightly different though

2024-06-19T22:04:32+01:00

In case of UTC

2024-06-19T21:04:32Z

fwiw ntpTZ is not really a TZ name, but a specification string for either plain offset or DST settings. In case of CET / CEST - CET-1CEST,M3.5.0,M10.5.0/3 - outputting that near the timestamp would be pretty verbose. Although, while it seems it would be possible to extract text strings for DST and non-DST, libc routines that are used for timezones are not actually returning the numerical offset for DST and non-DST :/