About 10% of Jews do not work on the first two days of this holiday one day for some branches , in accordance with Jewish law, and will not want to travel during this holiday, because they want to be able to have meals in the sukkah.
In 2023, January 1st is a Sunday so the holiday will be observed on January 2nd.
Traditionally, no Jewish weddings take place between Passover and Shavuot except on Lag B' Omer that's the date I chose for my wedding in 2013! It lasts for one or two days, depending on your branch of Judaism.
Traditionally, the blood of an animal was sacrificed as a way to remove sin or defilement.