Freeview signals will be boosted enabling thousands of homes to receive the digital service for the first time.
An advice line and website are available to help with the switchover.
Analogue services are scheduled to be switched off in two stages at each transmitter group. BBC Two will become digital on the first date.
Switch over dates
At stage two, the remaining analogue channels will be permanently switched off and replaced with additional digital TV, radio and text services.
|Area||Transmitter||Stage one||Stage two|
|West Sussex (most)||Midhurst||29 February 2012||14 March 2012|
|West Sussex (part)||Rowbridge||7 March 2012||21 March 2012|
|Brighton||Whitehawk Hill||7 March 2012||21 March 2012|
|East Sussex||Heathfield||30 May 2012||13 June 2012|
|Tunbridge Wells area||Tunbridge Wells||30 May 2012||13 June 2012|
|Hastings area||Hastings||30 May 2012||13 June 2012|
|South and east Kent||Dover||13 June 2012||27 June 2012|
|North and mid Kent||Bluebell Hill||13 June 2012||27 June 2012|
via BBC News