BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
DTSTART:20210710T180000
DURATION:PT00H00M00S
SUMMARY:[DEADLINE] Deforestation
DESCRIPTION:(deadline: 2021-07-10 18:00:00)
BEGIN:VALARM
TRIGGER:-PT24H
DURATION:PT10H
ACTION:DISPLAY
DESCRIPTION:DEADLINE REMINDER for Deforestation
END:VALARM
END:VEVENT
BEGIN:VEVENT
DTSTART:20210715T180000
DURATION:PT00H00M00S
SUMMARY:[DEADLINE] The Deforestation issue
DESCRIPTION:Dear students
Find attached your new activity worksheet with detailed information.
After carrying it out, don't forget to post it!
Good luck! 
(deadline: 2021-07-15 18:00:00)
BEGIN:VALARM
TRIGGER:-PT24H
DURATION:PT10H
ACTION:DISPLAY
DESCRIPTION:DEADLINE REMINDER for The Deforestation issue
END:VALARM
END:VEVENT
END:VCALENDAR