A holiday is a day designated as having special significance for which individuals, a government, or a religious group have deemed that observation is warranted. It is generally an official (more common) or unofficial observance of religious, national, or cultural significance, often accompanied by celebrations or festivities.
2 Regional meaning
2.1 Australia, Canada, UK
3 Types of holiday (observance)
3.1 Religious holidays
3.2 Northern Hemisphere winter