When writing a letter to the Royal Family to wish them a Happy Easter, start with a formal greeting, such as 'Your Majesty' or 'Your Royal Highness', depending on the recipient. In the first paragraph, express your wishes in a warm and respectful way, such as: 'I would like to extend my warmest wishes to you and your family for...

For the Christmas letter, also start with a formal greeting. In the first paragraph, wish them a Merry Christmas with a warm message, such as: 'I wish you and your family a Merry Christmas filled with joy and happiness.' You can include a comment about the Christmas spirit or the importance of the season, mentioning generosity and family...