Single day all day appointments in .ics files

Question

I\'m creating an ics file using ASP.NET for importing holiday into Outlook 2007 and trying to set the all-day-event flag. This works fine on multi-day holidays, but for sing

Answer 1

I know I am very late to the party, but according to the original RFC, an all-day event is specified by a DTSTART with no DTEND. This works for me in Outlook 2007 and Google.