BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VFREEBUSY
UID:19970901T082949Z-FA43EF@example.com
ORGANIZER:mailto:jane_doe@example.com
ATTENDEE:mailto:john_public@example.com
DTSTART:19971015T050000Z
DTEND:19971016T050000Z
DTSTAMP:19970901T083000Z
END:VFREEBUSY
BEGIN:VFREEBUSY
UID:19970901T095957Z-76A912@example.com
ORGANIZER:mailto:jane_doe@example.com
ATTENDEE:mailto:john_public@example.com
DTSTAMP:19970901T100000Z
FREEBUSY:19971015T050000Z/PT8H30M,
 19971015T160000Z/PT5H30M,19971015T223000Z/PT6H30M
URL:http://example.com/pub/busy/jpublic-01.ifb
COMMENT:This iCalendar file contains busy time information for
  the next three months.
END:VFREEBUSY
BEGIN:VFREEBUSY
UID:19970901T115957Z-76A912@example.com
DTSTAMP:19970901T120000Z
ORGANIZER:jsmith@example.com
DTSTART:19980313T141711Z
DTEND:19980410T141711Z
FREEBUSY:19980314T233000Z/19980315T003000Z
FREEBUSY:19980316T153000Z/19980316T163000Z
FREEBUSY:19980318T030000Z/19980318T040000Z
URL:http://www.example.com/calendar/busytime/jsmith.ifb
END:VFREEBUSY
END:VCALENDAR