Norse pagan holidays, also known as Heathen holidays, are based on the seasonal cycles of the northern hemisphere and the myths and legends of the Norse gods and goddesses. Here are some of the major holidays celebrated in Norse paganism with their brief descriptions and dates:

1. Yule - December 21: This is the winter solstice and the shortest day of the year. Yule marks the beginning of the winter season and is celebrated with feasting, drinking, and lighting fires to symbolize the return of the sun.

2. Imbolc - February 2: This holiday marks the midpoint between the winter solstice and the spring equinox. It celebrates the first signs of spring, such as the return of daylight and the budding of plants.

3. Ostara - March 21: This is the spring equinox and marks the beginning of spring. Ostara is a time of renewal and rebirth and is celebrated with feasting, egg decorating, and planting new gardens.

4. Beltane - May 1: This holiday marks the midpoint between the spring equinox and the summer solstice. Beltane is a celebration of fertility, growth, and the coming of summer. It is traditionally celebrated with dancing around a Maypole and lighting bonfires.

5. Midsummer - June 21: This is the summer solstice and the longest day of the year. Midsummer marks the height of summer and is celebrated with feasting, dancing, and lighting bonfires to honor the sun.

6. Lammas - August 1: This holiday marks the midpoint between the summer solstice and the autumn equinox. Lammas is a celebration of the first harvest and the beginning of the harvest season.

7. Mabon - September 21: This is the autumn equinox and marks the beginning of fall. Mabon is a time of balance and reflection, and is celebrated with feasting, wine-making, and apple picking.

8. Samhain - October 31: This holiday marks the end of the harvest season and the beginning of winter. Samhain is a time of honoring the dead and celebrating the cycle of life and death. It is traditionally celebrated with bonfires, feasting, and divination.

Note: These dates may vary slightly based on the specific Norse pagan tradition or individual interpretation.