Could you clarify exactly how you derived your table, in terms of the IANA data?

If you look at https://nodatime.org/tzvalidate/generate?version=2019c&zone=Europe/Istanbul - which is generated from IANA data - it shows DST changes stopping in September 2016, just as you said.

Likewise if you look at the current source data, you'll see the same result.

I suspect this is a problem of data interpretation rather than anything else.

Jon


On Mon, 2 Dec 2019 at 17:32, Benjamin Weiser <Benjamin.Weiser@inrix.com> wrote:

Hello,

 

I’d like to report your downloads for the following Time Zones from this URL on your site are out of date: https://www.iana.org/time-zones

 

For instance Europe/Istanbul moved to UTC 3 permanently in September of 2016 and no longer follow DST.  

 

I will place the correct times first, and then the incorrect IANA times second. Highlighted in orange have the incorrect time zone information (0 means there is no DST, 1 means they follow DST)

 

 

TimeZone

UTC Offset

ObservesDST

IANA_UTC_offset:

IANA_ObservesDST:

America/Campo_Grande

-4

0

-4

1

America/Sao_Paulo

-3

0

-3

1

America/St_Johns

-3.5

1

-3

1

Asia/Sakhalin

11

0

10

0

Australia/Adelaide

9.5

1

9

1

Australia/Darwin

9.5

0

9

0

Australia/Lord_Howe

10.5

1

10

1

Europe/Istanbul

3

0

2

1

Indian/Cocos

6.5

0

6

0

Pacific/Chatham

12.75

1

12

1

 

Thanks.