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Very slow datetime parsing with invalid time zone information

#22

@@@ $ ruby ./outlook.rb

2009-08-17T13:30:00+03:00
2009-08-17T14:30:00+03:00
3.450000   0.040000   3.490000 (  3.628539)

Reported by Edgars Beigarts · August 24th, 2009 @ 12:39 PM

State: open
Milestone: none
Assigned to: Rick DeNatale Rick DeNatale

Activity

  1. Rick DeNatale
    Rick DeNatale
    • State changed from new to open
    • Assigned user set to Rick DeNatale

    Just noticed this.

    Not sure how to approach, Microsoft Outlook apparently produces VTIMEZONES like this:

    BEGIN:VTIMEZONE
    TZID:FLE Standard Time
    BEGIN:STANDARD
    DTSTART:16010101T040000
    TZOFFSETFROM:+0300
    TZOFFSETTO:+0200
    RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10
    END:STANDARD
    BEGIN:DAYLIGHT
    DTSTART:16010101T030000
    TZOFFSETFROM:+0200
    TZOFFSETTO:+0300
    RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3
    END:DAYLIGHT
    END:VTIMEZONE

    So they think that Eastern daylight saving time starts at January 1, at 2:00 am, and ends one hour later, but that's not the important part, they think that it's been this way since January 1, 1601.

    This must have been initiated by some American native tribe since 1601 pre-dates permanent Western settlements in North America as far as I know.

    The problem is that this requires RiCal to step through all those time zone changes to get to the event time, which is a bit expensive.

    I'm not sure how to approach 'fixing' this.

    September 4th, 2009 @ 10:56 AM

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