Time Zone DST for 27P and 29G in US not correct.

[mjradik]

So I'm new to Yealink, and decided to use the T-27P and T-29G phones exclusively. Great phones so far, but I noticed it is not calculating Day light savings time correctly in the United States. It is making the time on the phone off by 1 hour. In doing searches, I've seen people with these problems going back to 2013, with may different types of phones. I'm using the latest x.80.0.25 firmware files.

If I set the time zone to:
local_time.time_zone = -5
local_time.time_zone_name = US-Eastern Time
local_time.summer_time = 2

The time is 1 hour early (Like it is not applying DST). The DST mode is set to automatic. However, If I change the Time zone to Bahamas(Nassau), it sets the time/DST correctly. Bahamas(Nassau) and US-Eastern have the same DST settings.

I also notice if I set the time zone to "Canada-Manitoba(Winnipeg)" for Central, "Canada(Edmonton,Calgary)" for Mountain, and "Canada(Edmonton,Calgary)" for Pacific, it sets the time correctly.

I know I'm not the only one with this issue. Can't Yealink get their Time zones correct?