The chairman of East Riding of Yorkshire Council, Councillor Nigel Wilkinson, will read the Yorkshire Declaration at 11.46am, with support from the Driffield Town Crier.
The full day of activities will include Morris dancing by The Raven Morris Dancers, as well as Yorkshire Pudding and Spoon Racing, and flinging a flat cap. In the house, there will be opportunities to make Yorkshire flags and also traditional Yorkshire recipes.
Outside in the woods, there will be four performances by Rusticus Woodland Creatures Theatre: ‘Great Yorkshire Moments’ will include flying firsts; Yorkshire Puddings; and a chance to be crowned Sewerby King of the North. These performances must be booked in advance – visitors must book a pod at the Welcome Centre.
In addition, Rusticus Woodland Creatures Activity Days will feature Mouse, who will turn their hand to stick fighting. Visitors will take part in fun spotting, collecting and making activities.
There will be an Orangery concert at 2pm by The Assembly Line: a ukulele band made up of seniors from The East Riding, playing jazz, blues, folk and pop.
The zoo will be open, as will the Clock Tower Café and a range of other facilities.
General manager Marie Gascoigne said: “We always look forward to Yorkshire Day here at Sewerby Hall and Gardens, and we have a very varied programme of fun activities this year!”
For full details of all facilities available, opening hours, and admission prices, plus details of all events during the summer holidays, visit www.sewerbyhall.co.uk