Google Takeout has long offered options for downloading your data from Drive, Blogger, Google+ and a dozen other services. Today, Google announced that Gmail and Calendar data can be downloaded through Takeout too. You have the option of downloading all Calendar data or just the calendars that you specify. Similarly, you’ll be able to download all Gmail data or specify that you only want messages with a particular label to be downloaded.
Downloading of Calendar data is available to everyone right now. Downloading of Gmail data will be rolled-out over the next month.