According to the Jewish website Chabad.org, which explains the term further - Like the head controls the body, our actions on Rosh Hashanah have a tremendous impact on the rest of the year. It also marks the start of the Jewish holiday season and includes a number of festive traditions. It starts the ten days of repentence which ends with Yom Kippur, which is a week from Friday.
The Rosh Hashana evening service will be on Wednesday at 8, with a morning service next Thursday at 10, followed by a "young family" service at 3 p.m. and Tashlich at Main Beach at 4:30 p.m.
Last year it was held on October 2 and the date changes each year.
Around 100 blasts can often be heard throughout the New Year at the synagogue and it symbolises a call for repentance.
In many synagogues, there will be a blowing of a ram's horn, or shofar, today to signal the new year, the year 5778 in the Hebrew calendar.
The festival is a chance to enjoy time spent feasting with friends and familyWhy do the dates of Rosh Hashanah change?
Rosh Hashanah is celebrated with a candle lighting ceremony.
Some denominations celebrate the festival for different lengths and only observe one day instead of two. Yaakov Finkelstein, Consul General of Israel in Mumbai, said, "The Rosh Hashanah symbolises a new beginning".