The iCalendar standard does actually support that, but perhaps Google Calendar's UI does not. I suspect it does work internally, because it interoperates with i

The iCalendar standard does actually support that, but perhaps Google Calendar's UI does not. I suspect it does work internally, because it interoperates with iCalendar fairly well. The standard calls it a "floating" DATE-TIME: "The recipient of an iCalendar object with a property value consisting of a local time, without any relative time zone information, SHOULD interpret the value as being fixed to whatever time zone the "ATTENDEE" is in at any given moment."