What a joy it is to announce the celebration service of the anniversary of our church's founding! Consider this your invitation to our Church Anniversary!Follow a few simple steps to create a variety of invitation letters for your church using our free templates. Church Anniversary Letters will provide you with a large selection of Announcement Letters to assist in your efforts of celebrating this very special day! I am writing to kindly extend an invitation to you for our Church's Anniversary celebration. Our beloved house of worship turns 100 this year. I am hosting a festival to celebrate such and such. I am inviting you to join the festivities on this day. Whether you're looking to implement this into an email, a physical letter in the mail, or both, see below for a few templates you can copy and paste. Although not a requirement, your U.S. host can write a letter.