[Alpine-info] ical display confuses me about timezones.

[Eduardo Chappa]

On Fri, 16 Sep 2022, D. Hugh Redelmeier wrote:


> I've noticed times reported as "Eastern Standard Time" even if they are

> actually in "Easter Daylight Savings Time".  In this message I explore

> why.

>

> Here's an example:

>   Start Date: Wed 2022-10-12 09:30 AM (Eastern Standard Time)

>   End Date: Wed 2022-10-12 10:20 AM (Eastern Standard Time)

> Those are really Eastern Daylight Times.  The time is right for EDT.


The sending agent added the parameter TZID with value Eastern Standard 
Time to the DTSTART field in the event. That is where Alpine takes this 
value from. This means the TZID field is incorrect from origin.

I do realize, however, that it is possible to compute the correct timezone 
in effect at the time of the event from the VTIMEZONE description and 
overriding the value received by Alpine in the DTSTART field, so I will 
look into that and update the repository to reflect this observation.

I will also look into other fields that need to be corrected.

Thank you for your input. It is appreaciated!

-- 
Eduardo