Aakosir
I got a Happy New Year from my Jewish friend the other day. It was Wednesday, right?
So why is it boys are 13 and girls are 12? And only one day? Isn't there another time when you fast for a week? Rosh Hashanah was Wednesday night until Friday night, at which point it was Shabbat until Saturday night.
No halacha-obeying Jew could do any work for 3 days. NICE.
xd I barely even had to do any chores.
The year when you come of age is related to the Bar/Bat Mitzvah, which is a different affair.
And it's only one day because... Well, after a day of repenting and atoning and complete self-denial, the break-fast that night is a welcome sight indeed. G-d commanded it would be one day.
There are very few fast days in Judaism, especially compared to something like Islam where you fast during the daylight hours every day for the month of Ramadan. Yom Kippur is actually really the only big one, but the Orthodox have their fast of Gedaliah for one day and their fast for Tisha B'Av for one day...