To dream of public rejoicings means personal sorrow. To participate in them represents mental delusion.
Dream dictionary: Rejoicings dream meanings
Rejoicings, enjoyment. To eat them, joy, gain; to gather them, considerable increase of fortune; to throw them away, loss, care, and bitterness; to trample them under foot, abundance.
Rejoicings, gain, profit. To eat them, a sign that the dreamer will be deceived by a woman; to throw them away, troubles caused by the envy of others.