NewCalendar build new Calendar.

NewEvent build new calendar event.

https://en.wikipedia.org/wiki/List_of_tz_database_time_zones.

SetStampFormat set date format.

SetEndFormat set date format.

SetStampFormat set date format.

SetStampFormat set date format.

SetStartFormat set start format.

WithClass set class.

WithCreated set created.

WithDesc set description.

WithEnd set end time.

WithLocation set location.

WithMethod set method.

WithCreated set created.

WithProdID set prod id.

WithScale set scale.

WithSequence set location.

WithStamp set stamp.

WithStatus set status.

WithSummary set summary.

WithMethod set method.

WithTransparent set transparent.

WithUID set uid.

WithVersion set version.

Date DTSTART:19980313T141711Z DTSTART;VALUE=DATE:19970317 DTSTART;TZID=America/New_York:19970902T090000.

CalendarOption calendar option.

EventOption calendar event option.