iCal4j - FreeBusy

The iCal4j FreeBusy service provides support for generating iCalendar free/busy information from existing iCalendar data.

Overview

The iCalendar specification defines the VFREEBUSY component that may be used to request, respond or publish resource availability.

Command Line Usage

Query for free one hour slots

ical4j-freebusy/bin/ical4j-freebusy request -F ./Australian32Holidays.ics

Result:

BEGIN:VCALENDAR
BEGIN:VFREEBUSY
DTSTAMP:20230113T130148Z
DTSTART:20230113T130148Z
DTEND:20230120T130148Z
DURATION:PT1H
FREEBUSY;FBTYPE=FREE:20230113T130148Z/P1W
END:VFREEBUSY
END:VCALENDAR