The Mayor of Eastbourne, Councillor Pat Rodohan, will attend a Civic Service of Commemoration, marking the death of Her Late Majesty Queen Elizabeth II.
The service will take place at St Mary the Virgin, Eastbourne Parish Church, Old Town at 6:00pm on Sunday 18 September.
The service is open to the public and civic dignitaries have been invited.
As part of a National Moment of Reflection, a one-minute silence to remember the life of Her Late Majesty, Queen Elizabeth II will also be observed across the UK at 8:00pm on Sunday 18 September.
The National Moment of Reflection is personal to every individual, but it is likely that many residents will step outside their homes just before 8pm to observe a doorstep tribute.