DDay iCalendar DTEND in UTC

Question

I have a date in UTC that I would like to use directly in my DDay iCalendar, but I cannot figure out how to tell the library that the time is in UTC. I believe it's a matter of appending a Z at the end of my time, but I can't figure out how to specify DDay should suffix with a "Z":

"Good" iCalendar Date

DTEND:20120110T223000Z

"Bad" iCalendar Date

DTEND:20120119T170000

Answer 1

This is how we implement it:

string sValue = DateTime.Now.ToUniversalTime().ToString(@"yyyyMMdd\THHmmss\Z");