BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN TZ:+00 BEGIN:VEVENT DTSTART:20250214T000000Z DTEND:20250214T000000Z SUMMARY:ADVANCED STUDY COURSE ON OPTICAL CHEMICAL SENSORS (ASCOS2025): Pre-registration Deadline due before 14th February 2025 LOCATION:University of Leon,Leon,Spain END:VEVENT END:VCALENDAR