tz file format

[russ]

Hi,

I hope i'm not wasting your time.  I'm attempting to read the tz database
into a c# application, and I'm not sure how to interpret this entry:

Zone Australia/Hobart    9:49:16    -    LMT    1895 Sep
            10:00    -    EST    1916 Oct 1 2:00
            10:00    1:00    EST    1917 Feb
            10:00    Aus    EST    1967
            10:00    AT    EST

What is the significance of the "1:00" on the row ending in "1917 Feb".  Do
I just add this to the 10:00 offset?

Thanks,
Russell
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