Greenwich and Bexley Cottage Hospice has teamed up with a Kent shopping centre for an all-day Christmas Spectacular featuring live bands and a huge Christmas Market.
The highlight of Sunday's events, organised in conjunction with The Mall Bexleyheath, will be a Santa Parade and Bexleyheath town centre Christmas lights switch-on.
The hospice, based in Abbey Wood, is asking people to sign up for the Santa Parade and hopes to attract more than 2,000 of them. Last year 1,019 Santas took part in the promenade and the hospice wants to double that figure.
Community fundraiser Susan Adams said: "We want to see 2,000 Santas parading along the Broadway this year - double the Santas, double the fun and double the funds!"
The Santa Parade will start at 4pm at a leisurely pace from Bexleyheath Town Park, proceed beside Christ Church and turn left onto Broadway towards the Clock Tower.
The Christmas lights will be switched on at 5pm by the Mayor of Bexley, Councillor Bernard Clewes MBE. The Christmas Market is open from 11am and shoppers can enjoy live music from 1pm.
Asda Bexleyheath has agreed to provide refreshments for the estimated 2,000 people attending on the day.
Store general manager Joe Lock said: "Our store colleagues are looking forward to Sunday and raising money for Greenwich and Bexley Cottage Hospice.
"On a cold winter's day there's nothing better than a warm cup of tea and a mince pie so Asda is providing exactly that.
"This means there's no excuse for any Santa to go hungry whilst doing their bit for charity."
Registration for the Santa Parade costs £10 for people aged 16 and over and £5 for children between the ages of 5 and 15. The fee includes a free Santa suit, which can be collected from The Mall's Ask Me Point, at Central Square or downloaded from www.cottagehospice.org.uk.
Call 020 8319 9230 for more information, or email info@gbch.org.uk.
Greenwich and Bexley Cottage Hospice offers high quality specialist palliative care and support services for people with cancer and other serious illnesses and their families and carers at its facilities in Abbey Wood, in the community, in local care homes and at Queen Elizabeth Hospital.
