Calendar REST API in Office 365 APIs Preview
http://msdn.microsoft.com/EN-US/library/office/dn792114(v=office.15).aspx
Office 365 APIs Preview
http://msdn.microsoft.com/en-us/library/office/dn605892(v=office.15).aspx
office 365 api tools
http://visualstudiogallery.msdn.microsoft.com/7e947621-ef93-4de7-93d3-d796c43ba34f
reference
http://blogs.office.com/2014/05/12/net-and-javascript-libraries-for-office-365-apis/
http://blogs.msdn.com/b/somasegar/archive/2014/05/12/mobile-first-cloud-first-development-visual-studio-apache-cordova-tooling-and-cloud-optimized-net-futures.aspx