High-Level Timeline

(plus) Now (Sept) thru the end of October - Plan, convert/create/update test scripts in ALM, move pending support & project work into production
(tick) 10/13/2016 - SAP release of year end base level support pack
(tick) 10/13/2016 - Last date to implement support & enhancement changes until freeze ends on 12/07/2016
(tick) 10/15/2016 - Development Freeze begins
(tick) 10/17/2016 - End of day production snapshot to be used to refresh test environments (9/19 for SF3)
(plus) 10/24/2016 - Unit test
(info) 11/01/2016 - System Integration Test (regression test fixes: 11/22-23/2016)

(info) 12/02/2016 - Go-live weekend!

(info) 12/07/2016 - Development Freeze ends

(big grin)