[calsify] JSCalendar, recurrenceId and timezones.

[Michael Douglass <[e-mail]>]

I find the explanations about recurrenceId a little confusing.

To be or not to be...

When is it valid to actually have a recurrenceId property and if it 
exists what are the constraints?

It looks like it should never appear anywhere for a full calendar object 
with master and overrides.

It MUST appear in a 'detached' instance which represents a single 
override - for example being invited to a single instance.

Or - we could say it MAY appear in the override but its value MUST be 
the same as the key.

On timezones in overrides

I haven't found anything in 5545 that says the tzid MUST be the tzid in 
the master dtstart. Is it valid to have a recurrenceid with a different 
timezone?

I would suggest it shouldn't be.

As it relates to jscalendar:

The override keys are the local date time as calculated based on the 
master start using the master timezone.

What happens if an override changes the timezone? We can't use the 
recurrenceId value as that's the local time in the master timezone.

In iCalendar it's easy (I think). The recurrenceId timezone is distinct 
from the dtstart timezone so if I want one instyance of my meeting in 
London instead of New York I can easily override it. An example in 
jscalendar would help (me).