According to the iCal RFC, it should already accept DURATION as it is the default value type, so it really is a Calendar bug: https://datatracker.ietf.org/doc/html/rfc5545#section-3.8.6.3
According to the iCal RFC, it should already accept DURATION as it is the default value type, so it really is a Calendar bug: https:/ /datatracker. ietf.org/ doc/html/ rfc5545# section- 3.8.6.3