"daylight" variable set wrong for Europe/Berlin?

[U.Mutlu]

Hi,
according to this site: http://www.timeanddate.com/time/change/germany/berlin
the daylight saving time in Germany (TZ="Europe/Berlin") begins
on 2016-March-27 at 02:00 and ends on 2016-Oct-30 at 03:00.

My system's default timezone is set to "Europe/Berlin" (system is Debian Linux 8).

But the "daylight" global variable has the value 1 today.
Is that not a bug? Shouldn't that variable be 1 only in the
above said daylight saving period?

Also, when I in a C/C++ program set the TZ environment variable
explicitly to "Europe/Berlin" I get the same result.

What's the logic behind this illogic? ;-)


$ ./a.out
t = time(0)           = 1458397599
ctime(&t)             = Sat Mar 19 15:26:39 2016
mktime(localtime(&t)) = 1458397599
mktime(gmtime(&t))    = 1458393999
difftime(...)         = -3600.000000
tzname[0]             = CET
tzname[1]             = CEST
timezone              = -3600
daylight              = 1

switching to TZ=Europe/Berlin
t = time(0)           = 1458397599
ctime(&t)             = Sat Mar 19 15:26:39 2016
mktime(localtime(&t)) = 1458397599
mktime(gmtime(&t))    = 1458393999
difftime(...)         = -3600.000000
tzname[0]             = CET
tzname[1]             = CEST
timezone              = -3600
daylight              = 1