Members of the Royal Black Instituition from Mid Ulster area will be on parade at venues in Loughgall and Raphoe tomorrow.
dThe annual 'Last Saturday' demonstrations brings the curtain down on the loyal order marching season.
Preceptories from east Tyrone will join other Sir Knights in the County Armagh village.
A total of 60 preceptories from west Armagh and south Tyrone will be on parade at noon, with similar number of bands.
The districts are Summerlanisland (Loughgall), Primatial City (Armagh), East Tyrone, Killymoon and Aughnacloy.
The main speaker will be the Institution's Sovereign Grand Master Millar Farr.
The Co Londonderry demonstration of 30 preceptories and bands will be at Raphoe village, Donegal, with a noon parade.
Districts are Londonderry City, Coleraine, Raphoe and South Londonderry. A Black demonstration was last held in Raphoe in 2005.