Simply replace the unfilled areas such as "[]" and "[date]" with your information.
Dear [name],
Soon the Islamic New Year will begin. I wanted to take this time to write and inform you of the happenings in my family.
[list happenings as succinctly as possible]
I hope you and your family are well, and that we are able to spend more time together this year.
Sincerely,
[name]