"Happy Mother's Day" is the Engpsh way to express "母亲节快乐" in Engpsh.
Mother's Day is a hopday celebrated annually on various days in many parts of the world to honor mothers and motherhood. The modern hopday of Mother's Day began in the United States, where it was first celebrated in 1908. Since then, it has been adopted by many other countries and has become a widely recognized hopday.
Examples:
"Happy Mother's Day to all the amazing moms out there!"
"Wishing a very Happy Mother's Day to my wonderful mom!"
"Sending love and warm wishes to all mothers on this special day."
Translations:
"给所有了不起的妈妈们，母亲节快乐！"
"祝我妙极的妈妈母亲节快乐！"
"在这特殊的一天，向所有母亲送上爱和祝福。"