[tz] TZ Data Base Questions

Lester Caine lester at lsces.uk
Wed Apr 1 18:55:29 UTC 2020

On 01/04/2020 16:30, Dustin J. Dirth via tz wrote:
> In the INANA time zone database, the file "europe" contains information 
> for Time Zone Europe/Dublin.

It should also be noted that for historic records, the UK/Ireland area 
is only valid for timezone data post 1970. The pre-1970 time frame will 
only be correct if the 'backzone' data is included to correct 
differences in the various islands in the area. Using those timezones 
may only return the London data without any warning. Other areas of the 
world have similar problems but there is the potential that the pre-1970 
data has not be validated. There is not currently any service that can 
be used to provide accurate pre-1970 due to there currently being gaps 
in the historic data.

Lester Caine - G8HFL
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