BEGIN:VCALENDAR
PRODID:-//event//iCal4j 1.0//EN
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20260426T165159Z
DTSTART:20250321T130000Z
DTEND:20250321T210000Z
SUMMARY:improving-performance
LOCATION:    
END:VEVENT
END:VCALENDAR