Here are 15 Mother's Day quotes and greetings from celebrities, authors, parenting experts and more for single moms, courtesy of Parade, Woman's Day and Reader's Digest. 1. "A mother is she who ...

There are straightforward options like, “To my dearest mom, on your special day: Happy birthday!” and “You’re simply the best.” Other thoughtful messages might extend a little longer, such as, “The ...