Some certainly only celebrate Rosh Hashanah because they feel guilty otherwise, but most Jews choose to celebrate Rosh Hashanah because they want to engage with their history and traditions.
Jewish New Year
partying
Reform Jews outside Israel generally celebrate Rosh Hashanah for only one day, while all other Jews celebrate Rosh Hashanah for two days. Reform Jews blow the Shofar on Rosh Hashanah even if it falls on Shabbat (the Sabbath), while others refrain from blowing the shofar on Shabbat.
Rosh Hashanah celebrates the New Year, the anniversary of the date that God created Adam and Eve.
Anywhere and everywhere Jews live.
Sabbath, Pesach, Shavuot, Rosh Hashanah, Yom Kippur, and Sukkoth.
they meet as a group to pray
Rosh Hashanah.
Rosh Hashana is the only Jewish holiday that is two days long both in and out of Israel. See the question "why does rosh hashanah last for two days"
Yes, because you can light additional candles on Rosh Hashanah from an existing flame.
In the United States, most schools are not closed on Rosh Hashanah.Some do, some do not. It all depends on the demographic of the school. If there is a large chunk of students that celebrate the holiday, then school will most likely close on Rosh Hashanah because enough students will miss school that day that it would be more efficient to close for the day.In Israel, schools do not usually open until after all of the Tishrei holidays, which means that school is closed on Rosh Hashanah.
Rosh Hashanah 2008 begins on sunset of Monday evening, September 29. Orthodox Jews celebrate 2 days of Rosh Hashanah, Reform Jews celebrate 1.