BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN TZ:+00 BEGIN:VEVENT DTSTART:20250331T000000Z DTEND:20250331T000000Z SUMMARY:ADVANCED STUDY COURSE ON OPTICAL CHEMICAL SENSORS (ASCOS2025): Early bird registration deadline due before 31st March 2025 LOCATION:University of Leon,Leon,Spain END:VEVENT END:VCALENDAR