The online event will celebrate the chalk grassland of the South Downs - often called "Europe's tropical rainforest" - which supports so many rare butterflies and wildflowers.
Wild Chalk 2020
kicks off on Sunday, 19th July, with a day dedicated to the area's "busy bees".
The Festival will be launched by Professor Dave Goulson, head of biology at the University of Sussex and author of "The Garden Jungle", who will give tips on what we can do to help bees, followed by a Facebook live with National Park Ranger Sophie Brown from the top of the South Downs showing bees using pollinator corridors across farmland.
Back in the city, Brighton & Hove City Ranger Sally Graham-Macleod will talk through creating an urban bee bank, before the day rounds off with a storytelling session from modern-day bard Ben Fairlight.
Laura Warren, Events and Engagement Officer for the South Downs National Park, said:
"Wild Chalk is one of our most popular headline events and the inevitable impact of COVID-19 has meant we've had to do things differently this year and be quite imaginative in our approach.
"We've taken elements from the visitor event and transformed them into a fun and educational package that will work well online.
"This virtual event is a first for us, but we"re really looking forward to engaging with people across the South East.
"There's something for everyone and all ages, whether you want to tune in for the whole week, or just want to dip into one of the films or activities that appeal to you.
"Our big aim is simply to inspire people. We want people to learn more about chalk grassland and what we can all do to help care for this delicate landscape.
"It really is a very special habitat, with some of the highest insect and plant diversity you'll find anywhere in Europe.
"We're so lucky to have it on our doorstep in Sussex and Hampshire."
The themes and highlights will be:
Sunday, July 19 – Busy bees
Monday, July 20 – Amazing Grazing, including "Meet the Sheep" with Brighton & Hove City Council Ranger Paul Gorringe.
Tuesday, July 21 – Flower Power, including Dr Dan Danahar and National Park Ranger Jan Knowlson exploring the flowers of Sussex and National Park Ranger Maddy Crews exploring the chalk grassland blooms of Hampshire. Also download a colouring sheet and gets tips in a live colouring-in session.
Wednesday, July 22 – Chalk Talk, including Aimee Felus, of The Aquifer Partnership, making a model of a chalk aquifer and exploring how chalk filters and cleans the water we drink.
Thursday, July 23 – Prehistoric South Downs, including a Facebook Live with Neolithic re-enactor Will Lord demonstrating fire lighting, flint knapping and hide tanning from his Stone Age camp.
Friday, July 24 - Beautiful butterflies, marvellous moths, including Robert Foreman, of Sussex Wildlife Trust, opening a trap to discover which moths inhabit the South Downs.
For all the details about Wild Chalk 2020 please visit www.southdowns.gov.uk and check out the National Park's Facebook, Instagram and Twitter.