Yom Kippur, or the Day of Atonement, is on the 10th of Tishrei, which this year falls on September 24. This day ends the 40-day cleansing process. They began on the 30th day of the life month, and at this time a sincere report, self-analysis and summary of the past year are made. Then comes the Ten Days of Repentance, an opportunity to return to Y-Mala, which began with Judgment Day on Rosh Hashanah and lasted until Yom Kippur, when everyone’s judgment is confirmed for the coming year.
Before Yom Kippur, it is customary to ask for forgiveness from acquaintances who were wronged, who were offended by word or deed, because Y-mal does not forgive a person until he has received forgiveness from other people.
On the eve of Yom Kippur (September 24 this year), an hour before sunset, a rich pre-fasting dinner is organized. Before going to the synagogue, the father (or, in his absence, the mother) traditionally blesses his children: “That you may be like Ephraim and Menashe, that Y-mal may bless and keep you, that He may be merciful to you, that He may do you good and send you peace!”
Fasting begins in the evening 18 minutes before sunset. It is forbidden to eat, drink, wash, use creams and wear leather shoes. Intimate relationships are also prohibited. As always, all work is prohibited on Shabbat.
Married men, going to the evening synagogue prayer on Kol Nidrei, take with them a candle that can burn all day. This candle is called “a lebedike licht” (candle of life). It is preferable not to light it yourself, but to ask the gabai, the elder of the synagogue, to do it. In addition, everyone who says the Izkor memorial prayer also lights a memorial candle in their home.
Yom Kippur prayers are filled with pleas for G-mal to forgive and atone for the sins of each individual and the entire Jewish people. The synagogue service begins with the cantor singing the Kol Nidrei prayer three times, with all the worshipers repeating each word after him. After that, the Maariv (evening prayer) begins. The next day’s morning prayer Shahharit begins early in the morning. After reading the Torah, there is a memorial prayer for the departed – Izkor.
After the Mussaf and Mincha prayers, the most solemn and final prayer of the day, the Neila, begins – the climax of the Yom Kippur day. Then the last shofar sounds and the Day of Atonement ends with the words: “Next year in Jerusalem!”
Source: https://www.ejc.ee/templates/articlecco_cdo/aid/2311163/jewish/Lhike-teejuht-Jom-Kippuriks.htm