Google Calendar is Google's web and mobile calendar and scheduling service, launched in limited beta on April 13, 2006 and out of beta in July 2009. It is offered free to consumers and as part of Google Workspace, where higher tiers add appointment booking pages. Google is the largest subsidiary of Alphabet Inc. (created October 2, 2015), headquartered at the Googleplex in Mountain View, California. The founded year reflects the product launch date; Google's own founding year was not confirmed from a fetched source.