My customers are starting to send me questions about setting up timesheets for 2016, so here's what you need:
PS2010: Create bulk time reporting periods (Project Server 2010 settings) - https://technet.microsoft.com/en-us/library/gg188098(v=office.14).aspx
Project Online: Create bulk time reporting periods - https://support.office.com/en-us/article/Create-bulk-time-reporting-periods-c9b26095-c171-4fa2-8090-79aff8e8981a
Also, please review the common administrator tasks as we will end a quarter and a year on Dec 31. http://blogs.technet.com/b/brookswhite/archive/2015/01/30/periodic-tasks-for-project-server-administrators.aspx
Originally posted at http://blogs.technet.com/b/brookswhite.