Hi – great questions!
1. If Im importing CSV data into event_start_date/event_end_date, what is the correct date format? Is it “YYMMDD”? Is it “YY-MM-DD”? Four letters for year, “YYYY-MM-DD”? Relatedly, whats the proper import format for time, event_start_time / event_end_time?
It’s pretty tolerant and actually accepts any valid date, time or compound date/time format as specified here. A format like yyyy-mm-dd (such as 2014-02-04 for 4th February 2014) is certainly going to be valid and 24hr times expressed in hh:mm format (such as 13:00 for 1pm) will similarly be a valid format choice.
2. Whats the field name for a featured image? Can it accept a url already stored on my server in my uploads dir?
Currently that is not supported; but please do post a feature request if you feel it would be a worthy feature – we’ll certainly consider it 🙂
Does that answer your questions?