BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
DTSTART:19700308T020000
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3
TZNAME:PDT
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:19701101T020000
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11
TZNAME:PST
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20261101T034015Z
UID:da258d51-81a1-4a7a-98ce-716294f63473
DTSTART:20101110T180000
DTEND:20101110T200000
SUMMARY:Working Group in the History and Philosophy of Logic\, Mathematics\
 , and Science\nJeremy Heis\nErnst Cassirer on 'Substance-concepts' and 'Fu
 nction-concepts'
END:VEVENT
END:VCALENDAR
