Start & End dates/times incorrect when parsing iCal.

[Anonymous]

I am parsing the iCal below and get incorrect date/time values. Please advise if I should be doing something differently?

BEGIN:VCALENDAR
PRODID:-//Microsoft Corporation//Outlook 10.0 MIMEDIR//EN
VERSION:2.0
METHOD:REQUEST
BEGIN:VTIMEZONE
TZID:Eastern Time
BEGIN:STANDARD
DTSTART:20131101T020000
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:Standard Time
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:20130301T020000
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:Daylight Savings Time
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
ATTENDEE;CN="";ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:m@op.com
ORGANIZER;CN="Trishla Sutaria":MAILTO:t@op.com
DTSTART;TZID="Eastern Time":20150817T144202
DTEND;TZID="Eastern Time":20150817T154202
LOCATION:East Conference Room
TRANSP:OPAQUE
SEQUENCE:1439836923
UID:9db2ab28-14a8-4773-b623-65d0e9832b5a
DTSTAMP:20150817T184202Z
DESCRIPTION:\nJOIN WEBEX MEETING\n
SUMMARY:M's test meeting
PRIORITY:5
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR

When the iCal is parsed, the start and end dates change to 08/13 from 08/17 and the time is different as well. Please see the parse results below. I am simply using
ICalendar ical = Biweekly.parse(new File("/sdcard/Download/WebEx_Meeting.ics")).first()
VEvent event = ical.getEvents().get(0);

2 = {java.util.LinkedHashMap$LinkedEntry@9546} "class biweekly.property.DateStart" -> " size = 1"
key = {java.lang.Class@6553} "class biweekly.property.DateStart"
value = {java.util.ArrayList@9560} size = 1
0 = {biweekly.property.DateStart@9588}
value = {biweekly.util.ICalDate@9589} "Thu Aug 13 20:04:53 EDT 2015"
parameters = {biweekly.parameter.ICalParameters@9590} "{}"
shadow$klass = {java.lang.Class@6553} "class biweekly.property.DateStart"
shadow$monitor = -1847570932
3 = {java.util.LinkedHashMap$LinkedEntry@9547} "class biweekly.property.DateEnd" -> " size = 1"
key = {java.lang.Class@5879} "class biweekly.property.DateEnd"
value = {java.util.ArrayList@9561} size = 1
0 = {biweekly.property.DateEnd@9595}
value = {biweekly.util.ICalDate@9596} "Thu Aug 13 20:19:53 EDT 2015"
parameters = {biweekly.parameter.ICalParameters@9597} "{}"
shadow$klass = {java.lang.Class@5879} "class biweekly.property.DateEnd"
shadow$monitor = -1651436715

[Michael Angstadt]

Hello. Sorry for the late reply.

I was not able to reproduce the issue. When I parsed the above iCalendar object, I got the correct dates--8/17/2015 14:42 and 8/17/2015 15:42.

[Anonymous]

Thanks for looking at the issue. I retried it and get the correct dates now. BTW, I tried to get the timezone using the code below, but tzi returns null for the above iCal. Anything I should be doing differently? Also, any timezones/time zone representations that I should be careful with?

        ICalReader iCalReader = new ICalReader(f);
        TimezoneInfo tzi = iCalReader.getTimezoneInfo();

Also, should getCreated() return DTSTAMP? And how do I get whether the event is an all day event?

[Michael Angstadt]

BTW, I tried to get the timezone using the code below, but tzi returns null for the above iCal. Anything I should be doing differently?

You must call "getTimezoneInfo()" after calling "readNext()".

:::java
ICalReader reader = ...
ICalendar ical = reader.readNext();
TimezoneInfo tzinfo = reader.getTimezoneInfo();

Also, any timezones/time zone representations that I should be careful with?

biweekly is pretty smart about timezones. If there's a particular timezone you're having trouble with, please let me know.

Also, should getCreated() return DTSTAMP?

The CREATED property stores the creation date of the calendar data. The DTSTAMP property, however, typically stores the time that the date that the calendar data was last updated (the LAST-MODIFIED property also stores this information). See the DateTimeStamp Javadocs for more information.

And how do I get whether the event is an all day event?

I'm pretty sure the best way to define an all-day even is to (1) define the start and end dates as dates (without time components) and (2) to set the end date one day ahead of the start date:

:::java
Date start = ...
Calendar c = Calendar.getInstance();
c.setTime(start);
c.add(Calendar.DATE, 1);
Date end = c.getTime();

VEvent event = new VEvent();
event.setDateStart(new DateStart(start, false));
event.setDateEnd(new DateEnd(end, false));