Zoho meeting adding option to calendar

Zoho meeting adding option to calendar

We recently moved to Zoho Mail and what was bit of a surprise is this - I recently registered for an webinar conducted by Zoho using Zoho meeting. On registration, i got a confirmation email with details of the meeting. Also it had an option to add to Google Calendar/Yahoo/Outlook, but no option to add to Zoho Calendar!!! I need to manually add it. 
Why cant you guys give add to Zoho Calendar as an option?!!