According to the FE on the British Monarchy website there are three engagements that date:
19 January 2018
The Princess Royal
Royal Patron, Hft, will attend a Luncheon Reception at The Manor House, High Street, Moreton-in-Marsh, Gloucestershire.
The Duke of Gloucester
Patron, British Limbless Ex-Service Men's Association today will attend the Blesma Community Programme at the Theatre Royal, Haymarket, London.
The Earl of Wessex
visits the Arthur Rank Hospice Charity, Cherry Hinton Road, Shelford Bottom, Cambridge.
This is what makes trying to follow the British royals so difficult as there is no centralised place to find information about what they are up to. They know they don't have to worry about PR and so they don't care about having all the information in one place for ease of access for followers.
It is much like last year's online CC which missed around 400 events but no one at BP or within the BRF actually cares about that sort of thing anymore as they are so sure of their popularity they don't think it matters that the office is so disorganised it can't put up a calendar in advance in one place - three or four courts all pulling in different directions is clearly what is happening.