[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I just wanted to take a moment to wish you a very happy 5th wedding anniversary! You and your husband really have experienced a blissful marriage so far. Sally and I want to invite you to enjoy a girls' day out on Saturday the 10th to celebrate your anniversary. We have some surprises for you, like an afternoon at the spa and a relaxing lunch. We hope you can make it, so just let me know.
Have a wonderful anniversary celebration this week with your husband, and again, Happy Anniversary!
Sincerely,
[Signature]
[Sender's first and last names]
