how to add / sync google calendar? I have a Xaomi Redmi Note 4G and have installed PAC-ROM-asrupesh-UNOFFICIAL-PORT.zip from XDA - [ROM][PORT] PAC ROM UNOFFICIAL for Redmi Note 4G Single Sim. I followed the steps from the forum to install the ROM.

Now I do not have my Gmail Calendar. If I go to Calendar -&gt; Settings I can see my Gmail account but no other calendar. If I hit Add Account there is no Gmail account.

If I go to Settings -&gt; Accounts -&gt; Google Account and click my Gmail account I want the calendar to be in my mobile, but I cannot see an option to sync calendar. It is not there.

Any idea how to add the Gmail Calender to my current ROM?
Have you checked calendar app is installed in your phone or not? I mean have you checked calendar app under Settings &rarr; App &rarr; Application? Search there and  if you find it there then start its service. You can than access it.

Read this Google support article: Sync problems with the Google Calendar app