The Day of the Dead is a Mexican holiday celebrated in Mexico and elsewhere associated to the Catholic celebrations of All Saints' Day and All Souls' Day.
Hanukkah is observed for eight nights and days, starting on the 25th day of Kislev according to the Hebrew calendar.
Winter is the coldest season of the year in polar and temperate zones (winter does not occur in most of the tropical zone). It occurs after autumn and before spring in each year. Winter is caused by the axis of the Earth in that hemisphere being oriented away from the Sun.