Question:

If a parent is in aveilos, can they dance at their own child’s wedding?

Answer:

Mazal Tov. You should have much nachas from the new couple. Regarding your question, during the year of aveilos, a parent may attend, dress in shabbos clothes and partake in the dancing of their child’s wedding.

Sources:

Rema 391-3, Nachlas Shiva 2-17, Divrei Sofrim 391- ftnt 62.

Rabbonim of the Beis Hora'a