Tuesday 16 July will be a public holiday to celebrate the arrival of His Majesty King Charles III and Her Majesty Queen Camilla in Guernsey.
The States of Guernsey say the decision was based on the 'historic significance' of the first visit of King Charles since his Accession to the throne.
It will be also be the first visit to the Channel Islands of a reigning monarch since Queen Elizabeth II in May 2005.
Economic Development's President Deputy Neil Inder hopes as many people as possible will get to see Their Majesties while they are here.
“I’m extremely pleased to be able to announce the decision by our Committee to hold a public holiday for the visit by Their Majesties, their first as King and Queen.
"It is an historic occasion and a cause for celebration.
"I do appreciate that this decision unavoidably comes at short notice for some, including those who will still need to staff their businesses and services.
"Ordinarily we would have taken time to consult with them, but I’m sure they’ll appreciate the speed at which we have had to make this decision, given how soon the visit will be."
The day will include a special States sitting, a ceremony of homage to His Majesty in St Peter Port, and a display of Guernsey's heritage along Crown Pier.
READ: King Charles III and Queen Camilla to visit Guernsey next month
Their full itinerary will be announced closer to the date.