The next paragraph reads: a letter from * * (name) on a certain day of a certain year.
In addition, it should be pointed out that
If this is about my father's birthday. You must write down the first paragraph and the next paragraph.
If it's not directly aimed at father's birthday, just write an autograph.
In addition, you can't write your last name in the next paragraph, only your first name, if you have a nickname that dad is used to. A nickname is the most appropriate. (Nickname, even a "dog" can stay. It is impossible to be elegant unless the nickname is too vulgar. )