One is obligated to be happy and in good spirits
and to make sure that his wife, children,
are happy as well ,
as it says:
“and you shall be happy on your festivals.”
This “happiness”includes the obligation
to make each member of one’s household happy
{Mishneh Torah, Holidays 6:17}
Original Hebrew text
Rambam (Mimonides) Mishneh Torah
Webinar 24/04/2016