Fetching details from the dictionary...

joy; delight; rapture; pleasure; gratification; rejoicing; congratulations; felicitations
合格の慶びを家族と分かち合った。
I shared the joy of passing with my family.
新年の慶びを込めて手紙を書いた。
I wrote a letter filled with New Year's joy.
結婚の慶びに友人たちが集まった。
Friends gathered to celebrate the wedding.