calendar ics import not handling time zones

[Localdev JS]

I received two calendar .ics files from two different people now, both times the calendar event has failed to import correctly into the calendar.

Example ICS file:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20150226T130000Z
DTEND:20150226T133000Z
SUMMARY:Service Appt
LOCATION:**********
DESCRIPTION:Service Appointment for ******
END:VEVENT
END:VCALENDAR

This incorrectly imports into my calendar as 1:00 to 1:30, whereas it should be 8:00 to 8:30 since I am in a "GMT - 5" time zone. The trailing "Z" at the end of the DTSTART and DTEND seems to be the issue here, it appears the import process is not picking up the reference to GMT / Zulu time.