Brazil considering a common time zone

David Patte dpatte at
Sat Jun 20 16:00:46 UTC 2009

Greetings from Ottawa

Can somone confirm if the UNTIL & TO dates provided in the tzfiles are 
all Gregorian dates?

In particular, I believe that Serbia & Russia switched from the Julian 
calendar to the Gregorian calendar in 1918, and Greece in 1923, yet some 
dates  recorded in the tzfiles for these locations span their switch of 
calendars. There may also be a similar issue with Alaska.

When processing historical zones before a locations's conversion 
conversion to Gregorian calendar, should I be interpretting the provded 
dates as Julian dates, or Gregorian dates?


David Patte
Relative Data, Inc.

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