Alfablót

Not much is told of the history of Alfablót, and not many sources mention it. This is probably due to the unusually private nature of this blót, which has made observations of this evening unheard of.
A few mention tells that the Norse people did celebrate Alfablót, but were very private about it. This does however attest to the presence or belief of the presence of Fey, in the Norse tribes.
With the reveal of the Asir and other Germanic Fey Folk, this blót yet again sees the light of day, and while some have been open enough to share what it is about, it is the one blót in the year, guests or observers are unwelcome to attend.

The celebration of Alfablót is, despite its name, curiously enough not centered around the Alfs but the Fey, leading to many believing that the Alfs at least started this tradition, which then spread onto the Vettir later.

In the privacy of the home, with only the household present and all gathered. Traditionally only natural light from candles or fireplaces are lit, and all power is off, as incense is lit and all household spirits are bid welcome to reveal themselves and be honored this night through good food, expressed thanks and social company throughout the evening.
That means any hidden Fey living within the home, such as kobolts, nisser and the like, as well as Fey bound to anyone in the household reveals themselves for this night.
In modern times, these Fey would probably already be revealing themselves to you occasionally, but this is still a night to celebrate them and show them that you are thankful for their presence.
If you know them well enough to know of their likes and preferences, this is the night to show it.
As the evening draws on, the snuffing of the last light marks the end of the celebration, which must be respected by the Fey (whether they feel done or not).

Only the household is present for this with an adult taking the lead in the welcoming and hosting. In a large household, it doesn’t matter who takes the role, however it is custom that one takes the lead for the entirety of the evening.
Should a guest be present, it is very likely that the Fey will never show themselves, feeling slighted instead, which might show in numerous petty ways.

Placed two full moons after the first new moon after the fall equinox, this festival is often held during November (the fifth of December at the latest), this celebration is the penultimate fest of the year for the Germanic Fey Folk.