Dates and times within emails are now lightly underlined. You can click them to schedule events at those dates and times without ever leaving Gmail. When you click on one of these underlined dates, you will be able to preview your schedule for the day and change the title, date or time of the event. You can then add the event to your calendar by clicking on “Add to calendar”. In addition, the calendar event will include a link back to the original email so you always have context.

Note: This is only available to people who have their preferred language set to English.

Release track:
Rapid release

Editions included: 
Google Apps for Business, Education, and Government

For more information:
http://googleenterprise.blogspot.com/2013/05/add-events-to-google-calendar-from-gmail.html

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