Updated December 2017
If you are using our 3GE editor, take a screenshot of your calendar and insert it as an image. If you are not sure how to create a screenshot here is a great guide on how to do so:
Make Screenshot Images Out of Other Documents
For 2GE users the option would be to create the calendar in your email using a table or to create a screenshot image and make it a link. Here's a good FAQ from Google on how you can do that: Share Calendar Item Link
When using the table option k eep in mind that a table doesn't always render well on all mobile devices. Since an email template is 600 pixels wide, we recommend choosing a template with a single column layout. If you need to add a larger calendar, you can link to a document or host it online and link to a website to save room.
Hope that helps. Please let me know if you have any other questions. Thanks.
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