GMail Updated With The Links Bar And Calendar Integration
When you begin to compose a message you will see a link on the right side of the screen that says “Add Event Info”. This link will allow you to enter in the details of the event that you are inviting the recipient to. When the recipient receives the email it will appear as an invitation that they can decide whether they will attend, might attend, or will not attend the event. If they decide that they will or might attend the event then it will be added to their calendar.
It’s not implemented for all gmail users just yet. However, it should be enabled in a couple of weeks.