Life cycle

Question 1

What is Bar/Bat MItzvah?

Answer 1

One who is obligated to perform mitzvot
Jewish law considered them adults and the responsibility becomes their own
Girl: 12 years & 1 day
Boy: 13 years & 1 day

Question 2

What is Upsherin?

Answer 2

First haircut ceremony for 3 year old boy:
child is old enough to begin formal education
child begins wearing yarmulke and tzitzit

Source:
A favorite precedent was the biblical law of orlah that forbids the eating of fruit until after the tree has passed its third year.

Question 3

What is onen?

What are the stages of mourning?

Answer 3

TBD
Onen: one who is in state of mourning and exempt from positive commandments

Stages

1) Shiva - 7 days mourning: torn clothing, no having, no leather shoes, sitting in low chair, no work
2) Shloshim - from conclusion of shiva to the morning of the 30th day
3) 12 months - no festive events unless it is a seudat mitzvah (mourning for parent)
4) Yahrzeit - the anniversary of the death of a parent or other close relative, marked by the burning of a memorial candle
5) Yizkor - on certain festival days, special prayers for remembrance are said