Hi,
I am quite "frightened" to take up this topic again and again lest you all be bored.
But interestingly, this one http://publictest15.fedoraproject.org/calender/ can fulfill all our requisites.
But, I don't use a calender on my phone, so I never used remote export/import etc. And no surprise that I shall not be able to test it fully. So, if someone who is familiar with these help me out, it will be nice.
Thanks.
[1] https://fedorahosted.org/fedora-infrastructure/ticket/1197