zdump -v Europe/Helsinki | head -5 gives

Europe/Helsinki  Fri Dec 13 20:45:52 1901 UTC = Fri Dec
13 22:25:44 1901 EET isdst=0 gmtoff=5992
Europe/Helsinki  Sat Dec 14 20:45:52 1901 UTC = Sat Dec
14 22:25:44 1901 EET isdst=0 gmtoff=5992
Europe/Helsinki  Sat Apr 30 22:20:07 1921 UTC = Sat Apr
30 23:59:59 1921 EET isdst=0 gmtoff=5992
Europe/Helsinki  Sat Apr 30 22:20:08 1921 UTC = Sun May
 1 00:20:08 1921 EET isdst=0 gmtoff=7200
Europe/Helsinki  Thu Apr  2 21:59:59 1942 UTC = Thu Apr
 2 23:59:59 1942 EET isdst=0 gmtoff=7200
Europe/Helsinki  Thu Apr  2 22:00:00 1942 UTC = Fri Apr
 3 01:00:00 1942 EEST isdst=1 gmtoff=10800

Python 2.4.1 (#1, May 16 2005, 15:19:29) 
[GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
->> from datetime import datetime
->> from dateutil import tz
->> str(datetime(1920, 1, 1, 0, 0,
tzinfo=tz.gettz('Europe/Helsinki')))
Traceback (most recent call last):
  File "<input>", line 2, in ?
ValueError: tzinfo.utcoffset() must return a whole
number of minutes
->>
tz.gettz('Europe/Helsinki').utcoffset((datetime(1900,
1, 1, 0, 0)))
datetime.timedelta(0, 5992)
->>