Sukkoth. However, the question as put, is based on a misinterpretation of Nehemiah 8:17. The Israelites (Jews) always kept their festivals, as is clear from a number of verses. Nehemiah was referring in the quoted verse to the happiness with which they observed the festival, not the observance itself. They were joyful because the Second Temple had just been built.
If I remember correctly, he went to Nearly Headless Nick's Death Day party.
There are feast days of all sorts throughout the year. Different religions have them for simple events and saints and other small things, right up to major events in different religions. So nearly every day of the year is a feast day as far as someone is concerned.
Okonkwo beat his wife before the feast of the new yam. Then when Ekwefi backtalks, he nearly kills her by shooting his gun near her. She is however physically unharmed.
The Feast of the Holy Innocents, The Feast of the Circumcision, and Twelfth Day were in January. People often celebrated the feast day of a local patron saint as a holiday, and the saint could be associated with a church or the family of a local lord; since nearly every day in the year was a feast day for some saint or other, there were other possibilities.
There are nearly 20 saints per day with feast days in December so you need to narrow things down a bit.
The plural of feast is feasts.
Nearly all the recognized saints have a designated feast day each year. However, there are thousands and thousands of saints in Heaven whose names are known only to God who do not have a feast day. All Saints Day recognizes all the unnamed saints.
feast
why did they have a feast? what were they celebrating?
Is feast plural
Feast can be a noun and a verb. As a noun: We enjoyed a lovely Thanksgiving feast. As a verb: Feast your eyes on that turkey!
The noun 'feast' is a standard collective noun for 'a feast of brewers'.