BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20210705
DTEND:20210709
SUMMARY:OPTIQUE Dijon 2021
LOCATION:Congrexpo, Dijon France 
DESCRIPTION:
END:VEVENT
END:VCALENDAR