A source tells PEOPLE that the Duke and Duchess of Sussex have not received an invitation to this year’s royal Christmas gathering at Sandringham. The couple, who are expected to spend the holidays in the U.S., haven’t taken part in Christmas with the royal family since 2018, the year they married.

King Charles has continued a tradition that was firmly set in stone during the last part of the reign of Queen Elizabeth II: a Sandringham Christmas. For decades, the royals have gathered at the