The letter was dated July 16, 2013.
Dear Sister Lewis, (or Dear Brother Lewis, we each received a letter)
You are hereby called to serve as a missionary of The Church of Jesus Christ of Latter-day Saints. Your are assigned to labor in the Maryland Baltimore Mission. Your primary assignment is to labor as a member and leader support missionary. It is anticipated that you will serve for a period of 18 months.
The letter said much more and it was beautiful.
Signed by Thomas S. Monson
President of The Church of Jesus Christ of Latter-Day Saints.