我正在尝试在我的日历中安排一个约会，该约会从 1 月 11 日开始的每个星期六进行。第一次会议是在 1 月 11 日下午 6：15 -7：15 GMT +5：30(太平洋夏令时上午 4：45 至凌晨 5：45，即格林威治标准时间 -08：00(，最后一次是 2020 年 3 月 14 日下午 5：15：00 - 格林威治标准时间下午 6：15 +5：30(太平洋夏令时 3 月 14 日上午 4：45 至凌晨 5：45，即格林威治标准时间 -07：00(。 当我在 IST(GMT +5：30( 时区打开 Outlook Mac 日历时，我看到最后一次出现的情况在日历上反映为 6：15 PM - 7：15 PM，而不是 5：15：00 PM - 6：15 PM。这是因为 Outlook mac 应用程序 ，没有从 ICS 正确考虑 DST。 但是，如果我在谷歌日历/Outlook Web应用程序/Outlook Windows应用程序中打开相同的ics，则考虑到夏令时，将在正确的时间安排约会。
以下是电子邮件所附的 ICS。
PRODID:-//MYCalendar//NONSGML Version 1//EN
VERSION:2.0
METHOD:REQUEST
BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:STANDARD
DTSTART:18831118T120702
TZOFFSETFROM:-075258
TZOFFSETTO:-0800
RDATE:18831118T120702
END:STANDARD
BEGIN:STANDARD
DTSTART:19181027T020000
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
RDATE:19610924T020000
RDATE:19500924T020000
RDATE:19550925T020000
RDATE:19600925T020000
RDATE:19540926T020000
RDATE:19530927T020000
RDATE:19590927T020000
RDATE:19520928T020000
RDATE:19580928T020000
RDATE:19570929T020000
RDATE:19560930T020000
RDATE:19450930T020000
RDATE:19510930T020000
RDATE:19490101T020000
RDATE:20081102T020000
RDATE:20071104T020000
RDATE:19851027T020000
RDATE:19911027T020000
RDATE:19961027T020000
RDATE:20021027T020000
RDATE:19641025T020000
RDATE:19701025T020000
RDATE:19811025T020000
RDATE:19861026T020000
RDATE:19971026T020000
RDATE:20031026T020000
RDATE:19691026T020000
RDATE:19751026T020000
RDATE:19801026T020000
RDATE:19871025T020000
RDATE:19921025T020000
RDATE:19981025T020000
RDATE:19631027T020000
RDATE:19681027T020000
RDATE:19741027T020000
RDATE:19191026T020000
RDATE:19621028T020000
RDATE:19731028T020000
RDATE:19791028T020000
RDATE:19931031T020000
RDATE:19991031T020000
RDATE:20041031T020000
RDATE:19181027T020000
RDATE:19671029T020000
RDATE:19721029T020000
RDATE:19781029T020000
RDATE:19881030T020000
RDATE:19941030T020000
RDATE:20051030T020000
RDATE:19661030T020000
RDATE:19771030T020000
RDATE:19831030T020000
RDATE:19891029T020000
RDATE:19951029T020000
RDATE:20001029T020000
RDATE:20061029T020000
RDATE:19651031T020000
RDATE:19711031T020000
RDATE:19761031T020000
RDATE:19821031T020000
RDATE:19841028T020000
RDATE:19901028T020000
RDATE:20011028T020000
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:19180331T020000
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
RDATE:19190330T020000
RDATE:19180331T020000
RDATE:19740106T020000
RDATE:20070311T020000
RDATE:20080309T020000
RDATE:19480314T020000
RDATE:19750223T020000
RDATE:19550424T020000
RDATE:19600424T020000
RDATE:19660424T020000
RDATE:19770424T020000
RDATE:19830424T020000
RDATE:19860427T020000
RDATE:19540425T020000
RDATE:19650425T020000
RDATE:19710425T020000
RDATE:19760425T020000
RDATE:19820425T020000
RDATE:19530426T020000
RDATE:19590426T020000
RDATE:19640426T020000
RDATE:19700426T020000
RDATE:19810426T020000
RDATE:19520427T020000
RDATE:19580427T020000
RDATE:19690427T020000
RDATE:19800427T020000
RDATE:19510429T020000
RDATE:19570428T020000
RDATE:19630428T020000
RDATE:19680428T020000
RDATE:19560429T020000
RDATE:19620429T020000
RDATE:19730429T020000
RDATE:19790429T020000
RDATE:19610430T020000
RDATE:19670430T020000
RDATE:19720430T020000
RDATE:19780430T020000
RDATE:19840429T020000
RDATE:19500430T020000
RDATE:19850428T020000
RDATE:19880403T020000
RDATE:19940403T020000
RDATE:20050403T020000
RDATE:19890402T020000
RDATE:19950402T020000
RDATE:20000402T020000
RDATE:20060402T020000
RDATE:19900401T020000
RDATE:20010401T020000
RDATE:19910407T020000
RDATE:19960407T020000
RDATE:20020407T020000
RDATE:19970406T020000
RDATE:20030406T020000
RDATE:19870405T020000
RDATE:19920405T020000
RDATE:19980405T020000
RDATE:19930404T020000
RDATE:19990404T020000
RDATE:20040404T020000
RDATE:19420209T020000
END:DAYLIGHT
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=1SU
DTSTART:20200308T031746
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=SU
DTSTART:20201101T031746
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:19700119T062939Z
ORGANIZER:mailto:XXX@gmail.com
UID:MEQ6H_79ptdgclzt@KxijUD26wIoRpbH
SEQUENCE:0
RRULE:FREQ=MONTHLY;WKST=SU;COUNT=10;INTERVAL=1;BYDAY=SU;BYSETPOS=2
ATTENDEE;ROLE=REQ-PARTICIPANT;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;RSVP=TRUE:mailto:XXX@gmail.com
DTSTART;TZID=America/Los_Angeles:20200109T063000
DTEND;TZID=America/Los_Angeles:20200109T073000
SUMMARY:DEV Monthly Second sunday 10 occurences
TRANSP:OPAQUE
CREATED:20200109T141737Z
LAST-MODIFIED:20200109T141737Z
STATUS:CONFIRMED
LOCATION:SomeWhere
DESCRIPTION:NO Description
END:VEVENT
END:VCALENDAR
Outlook 以不能很好地处理即将到来的夏令时而闻名 https://www.google.com.au/search?q=outlook+calendar+1+hour+daylight+saving
此外，Outlook 很可能忽略提供的时区定义，并使用其自己的定义以在其日历中保持一致。