Exporting 1 segment at a time into .ics format

[sbjs]

I am trying to export 1 month from my Zimbra calendar into .ics format, rather than the entire calendar as a whole. Is there any way to do this?

Alternatively, is there a way to copy and paste events from one calendar to another Zimbra calendar? ie, take an entire month of events from calendar A and copy them into calendar b as well?

Thanks!