Calendar Column Dissapeared , Help Please!

Just couple of hours ago I lost my calendar column and using version 7.1.30794. It was supposed to be in between mail, tasks and contacts, but not there anymore. I need to see the calendar as I write my stuff there. Urgent help please! Thank you.

Right click on any of the other tabs and check “Calendar”.

Thanks a lot Norman, wish I knew it was that easy!