Rosh Hashanah literally means 'Head of the Year' and is a celebration of the creation of the world. It's known as the Jewish New Year.
It's a time to pray and look back at whether we've behaved well over the past year.
In the synagogue, a 'shofar' or ram's horn is blown to start a ten-day period known as the 'High Holy Days', the most religious time of the calendar.
It's traditional to eat sweet food, to symbolize hopes for a sweet year ahead. So bread or apple dipped in honey is eaten.
Two days in September or October