The Feast of Lights: (Danu 28-Taisham 1) The last day of the old year (the shortest of the year) and the first day of the new. In many localities the second day of the Feast of Lights is called First Day or Firstday and is considered a particular good time to give charitably.
High Chasaline: (Taisham 12) Also called "the Day of Reflection." A feastday, often with dancing that night (public in villages and smaller towns; usually at private gatherings in larger cities), on which you are supposed to reflect on your good fortune and the blessings of your life. It is considered bad form to complain about anything on High Chasaline, though that taboo is not always followed strictly.

Chansein: (Jumara 3) A day of wild indulgence in food, where the object seems to be to get other people to eat as much as they can hold and more. People carry hot pastries filled with meat or dried fruit, sometimes stuffing their pockets or actually carrying bagfuls, and hand them to everyone they see. It is considered extremely ill-mannered to fail to eat every crumb. (The Borderlands; Arad Doman)
Feast of Abram: (Jumara 9) Celebrated in Tarabon, Amadicia, Ghealdan, Andor, Altara, Murandy, Illian, Tear, and Cairhien.

Lamma Sor: (The day after the first quarter moon [called a "knife moon"] in Saban) Nothing is eaten but bread and water, salt, and oil. Also called the Day of Remembrance. It is a day of prayers for those who have fallen defending against the Blight, and for those who will fall. (Borderlands)

Winternight: (The night before Bel Tine) The night is spent visiting and exchanging gifts.
Bel Tine: Spring festival celebrating the end of winter, the first sprouting of crops, and the birth of the first lambs. Date determined locally.
The Feast of Thanksgiving: (Celebrated in Aine but not a day of that month) A feast celebrated once every four years, at the spring equinox.

Tirish Adar: (From the rise of the first full moon in Adar to the rise of the next moon) In most northern countries, no one sleeps more than an hour or two during that period.
Feast of Neman: (Adar 9) Celebrated in Andor, Cairhien, Tear, and the Borderlands.
The Feast of Freia: (Adar 21) Celebrated in Illian, Arad Doman, Ghealdan, Tarabon, and parts of Altara and Murandy.

Dahan: (Saven 9) Supposedly the anniversary of the final victory in the Trolloc Wars and freedom from the Shadow. Most historians believe the date was arbitrarily chosen.
The Feast of Fools: (Celebrated in Tammaz [in Arad Doman and the Borderlands] or Saven [everywhere else]) A day, varying according to locality, in which all order is deliberately inverted; the high perform lowly tasks (running errands, serving at table, etc.) while the low do no work and give orders to their usual superiors. In many villages and towns the most foolish person is given a title such as the Lord/Lady of Unreason/Misrule/Chaos or King/Queen of Fools. Not an honor sought, but for that one day everyone has to obey whatever orders, however foolish, are given by the chosen one. (Called the Feastival of Unreason in Saldaea; the Festival of Fools in Kandor; Foolday in Baerlon and the Two Rivers.) Note: In Tear, Illian, and the southern half of Altara, the time between the Feast of Abram and the Feast of Fools is considered the most prospitious for a wedding.

Asadine: (Ten days before Sunday) A day of fasting, with no food taken between sunrise and sunset. (The Borderlands, Cairhien) In the Borderlands, the day after is considered an especially propitious time to wed.
The Feast of Maia: (Amadaine 6) Celebrated in Andor, Ghealdan, Altara, Murandy, and Illian.
Bailene: (Amadaine 9) Celebrated in Arad Doman, Tarabon, Amadicia, and Tear.
Sunday: (Celebrated in Amadaine but not a day of that month) A feastday and festival at midsummer, celebrated in many parts of the world.

Genshai: (Tammaz 3) Brightly colored ribbons are worn by both men and women. (Tear, Illian, Amadicia, Tarabon, southern parts of Altara and Murandy)
Mabriam's Day: (Tammaz 18) Any sort of labor is avoided, and some go to great lengths to do so. The food is always cooked the day before, but some rise and dress in the dark on the theory that they have thus done that "work" before the day began. Young women traditionally play tricks on young men. These tricks are supposed to indicate the young woman's interest in the target man, but the young women work in groups and try to keep their actions as secret as possible. There are traditional forfeits if a young man guesses who is responsible, ranging from a kiss from the young woman who thought up the trick to a kiss from each in the group.
The Feast of Fools: (Celebrated in Tammaz [in Arad Doman and the Borderlands] or Saven [everywhere else]) A day, varying according to locality, in which all order is deliberately inverted; the high perform lowly tasks (running errands, serving at table, etc.) while the low do no work and give orders to their usual superiors. In many villages and towns the most foolish person is given a title such as the Lord/Lady of Unreason/Misrule/Chaos or King/Queen of Fools. Not an honor sought, but for that one day everyone has to obey whatever orders, however foolish, are given by the chosen one. (Called the Feastival of Unreason in Saldaea; the Festival of Fools in Kandor; Foolday in Baerlon and the Two Rivers.) Note: In Tear, Illian, and the southern half of Altara, the time between the Feast of Abram and the Feast of Fools is considered the most prospitious for a wedding.

Tandar: (Maigdhal 9) No one is supposed to let Tandar end still holding a grudge or having a disagreement with anyone. Although the intent is that the quarrelers should be reconciled, it is not unknown for festivities to be marred by attempts to meet the letter in quite another way.
Low Chasaline: (Maigdhal 18) In most places a day of fasting.

The Feast of All Soul's Salvation: (Celebrated in Choren but not a day of that month) A feast (also called All Soul's Day) celebrated once every ten years, at the autumn equinox.
The Festival of Lanterns: (Choren 1) Paper lanterns, often brightly colored, frequently fancifully shaped, are hung everywhere, in windows, in trees. (Arad Doman, Tarabon, Amadicia, Ghealdan, Altara, Murandy, Illian)
Bel Arvina: (The first day of autumn) A floating feast, date determined locally.

Amaetheon: (Shaldine 6) Everywhere except in the Borderlands this is a feast remembering the dead, not in a sad way, but joyously.
Shaoman: (Shaldine 12) Particularly oriented toward children, who are cosseted, praised, and given gifts. In many places groups of children go from house to house, where they sing songs before the door and are rewarded with small gifts or sweets.

Danshu: (The last day of Nesan)

The Feast of Lights: (Danu 28-Taisham 1) See Taisham 1.