BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN TZ:+00 BEGIN:VEVENT DTSTART:20210601T000000Z DTEND:20210601T000000Z SUMMARY:International Solar Power Technologies (SPTech) Conference: Oral abstract deadline due before 1st June 2021 LOCATION:University of Porto,Porto,Portugal END:VEVENT END:VCALENDAR