Ramadan is the ninth month of the Islamic calendar, which is a lunar calendar. Muslims observe fasting, prayer, charity, and self-reflection during this month, which commemorates the revelation of the Quran to Prophet Muhammad.
Eid al-Fitr is the festival of breaking the fast that marks the end of Ramadan. It is celebrated on the first day of Shawwal, the tenth month of the Islamic calendar, which is a lunar calendar. It is a joyous occasion of gratitude, charity, and social gatherings.
Eid al-Adha is the festival of the sacrifice that honors the willingness of Ibrahim to sacrifice his son Ismail as an act of obedience to God. It is celebrated on the tenth day of Dhu al-Hijjah, the twelfth month of the Islamic calendar, which is a lunar calendar. It is a solemn occasion of worship, charity, and pilgrimage to Mecca.
Rosh Hashanah is the Jewish New Year that marks the beginning of the first month of Tishrei in the Hebrew calendar, which is a lunisolar calendar. It is a time of repentance, prayer, and reflection on the past year and the future one.
Yom Kippur is the Day of Atonement that occurs on the tenth day of Tishrei in the Hebrew calendar, which is a lunisolar calendar. It is the holiest and most solemn day of the year for Jews, who observe fasting, prayer, and confession of sins.