Though the blunder seems to be the major reason for the Queen missing the royal baby's christening, this is not an unusual occurrence for Her Majesty.
“So they just didn’t get the diary dates right, I mean it is not the first time, that the Queen, who is the great-grandmother, after all, has missed a christening," the royal commentator noted.
The monarch and Prince Philip missed Prince Louis' christening in July last year due to prior commitments, and apparently consulted with Prince William and Kate Middleton before the announcement.
The Duke and Duchess of Cambridge were among the guests at Archie's Christening, along with Prince Charles, Duchess Camilla, Lady Jane Fellowes, Lady Sarah McCorquodale and Meghan's mother, Doria Ragland.
Meghan's father, Thomas Markle, recently opened up about his absence from Archie's christening.
Thomas told The Mail: “I have been asked if I would have liked to have gone to Britain to see my new grandson being christened...I was an altar boy at age 12, a confirmed member of the Queen’s church at age 14, and Archie is my new grandson, so of course, I would have enjoyed being there for the blessing, wishing Archie and his parent's health and happiness.”
Jobson told Sunrise that it was likely he was making a jab at his ex-wife, Doria.
"What he said wasn’t too bad except for I think he was having a little bit of a dig at his ex-wife Doria...Because he is saying that he has been a member of the Anglican Church all his life...I think when he married Doria it was in some sort yogi ceremony or something like that...I think he was having a little bit of a dig there saying why shouldn’t I be there," said Jobson.
WATCH: The moment Thomas Markle betrayed his daughter, Meghan Markle
Regardless of the comments made by Meghan's estranged father and the limited guestlist, it appears that Archie's christening was a special day for the Duke and Duchess of Sussex.