EntityQ223563· pop 46· linked from 676 articlesGoogle CalendarSign in to savetime-management and scheduling calendar serviceKey factsDeveloperGoogleInitial releaseBeta - April 13, 2006 ; 20 years ago ( 2006-04-13 ) , General - July 2009 ; 16 years ago ( 2009-07 )AndroidAndroid 2026.19 (Build 915581253) / May 21, 2026 ; 13 days ago ( 2026-05-21 )Wear os2026.18.1 (Build 917745678) / May 23, 2026 ; 11 days ago ( 2026-05-23 )Ios26.18 / May 18, 2026 ; 16 days ago ( 2026-05-18 )via Wikipedia infoboxArticleOperating systemAndroid 8+, Wear OS 3+, iOS 17+, watchOS 11+, webDiscontinuedRead full article (322 paragraphs)Gallery (4)Connectionslist of mergers and acquisitions by GoogleEntityChromeOSEntityCategoriesAndroid (operating system) softwareCalendaring softwareGoogle servicesInternet properties established in 2006IOS software