Just tested this entry from the list:
"Europe/Berlin","CET-1CEST,M3.5.0,M10.5.0/3"
Same problem as with other public examples: local time is correct, but file dates are offset 1 hour into the future.

# con set vehicle timezone "CET-1CEST,M3.5.0,M10.5.0/3"
Parameter has been set.

# time stat
Time Zone:  CET-1CEST;M3.5.0;M10.5.0/3
UTC Time:   2018-06-06 08:15:18 UTC
Local Time: 2018-06-06 10:15:18 CEST
Provider:   ntp
PROVIDER             STRATUM  UPDATE TIME
 gsm-nmea                  2      12 Wed Jun  6 08:15:18 2018
*ntp                       1      53 Wed Jun  6 08:15:17 2018

# vfs ls /sd

5 06-Jun-2018 11:14 testdate

Maybe this is a bug in the vfs.

"CET-2,M3.5.0/02:00:00,M10.5.0/03:00:00" works correctly now but I haven't tested if it would adapt to winter time.

Regards,
Michael


Am 06.06.2018 um 08:56 schrieb Mark Webb-Johnson:
A topic on esp32.com brought up this:

https://github.com/nayarsystems/posix_tz_db

The approach seems similar to what I spoke about before (scrape tzdata, although they scrape install zone files directly in /usr/share/zoneinfo). I’ve attached the csv output of that. 460 time zones, about 15KB code size. That is up-to-date with tzdata 2018d-1. Including a simple library wrapper, to (a) iterate over the zone names, and (b) return the posix string for a particular name, probably less than 20KB overhead.

I live in such a simple timezone, it is hard for me to judge. Is this any use?

Regards, Mark.



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