It will be attended by members of the diplomatic corps, members of the clergy, members of parliament and high-ranking politicians, all of whom are to deliver their tributes to Mrs Okoh after the service.
At 1: 15 pm, the remains will be interred at the Osu Cemetery, family sources have confirmed.
The thanksgiving service will be held at the Ridge Church on Sunday, after which the family will gather at her residence for the final funeral rites.
Mrs Okoh, who designed the national flag, is survived by three children, including Kwasi Okoh, Stanley Kwame Okoh and Theodosia Amma Jones-Quartey.
She was born Theodosia Salome Asihene on June 14, 1922 at Anum in the Asuogyaman District in the Eastern Region.
She was the fourth of eight children born to Very Reverend Emmanuel Victor Asihene, a former moderator of the Presbyterian Church of Ghana and Madam Dora Asihene.
She started school at Ashanti Efiduasi Primary School in the Ashanti region, continued to the Basel Mission Middle, Senior and Teacher Training Schools in Agogo and then Achimota School.
She married Mr Enoch Kwabena Okoh, the Head of Civil Service in the Nkrumah regime, and became known as Mrs Theodosia Salome Okoh.
Mrs Okoh was the only female to chair the Ghana Hockey Association and before her death was also a patron of the Sports Writers Association of Ghana (SWAG). Her outstanding contribution towards sports development in the country won her lots of plaudits and awards.