Prince Archie and Princess Lilibet are set to celebrate a "special" Christmas this year as their mum, Meghan Markle, braces for a "bittersweet" moment, a source has claimed.

And apparently, it's a tradition that Meghan Markle and Prince Harry continued to keep even after stepping down as senior royals and moving to California. From an excerpt in his book Spare published by The Sun on Friday,

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.