Well technically it's when 3 stars come out. Actually I just checked to make sure, it turns out the 3 stars thing is based on a definition by Maimonides: http:

Well technically it's when 3 stars come out. Actually I just checked to make sure, it turns out the 3 stars thing is based on a definition by Maimonides: http://en.wikipedia.org/wiki/Jewish_calendar#Measurement_of_hours http://en.wikipedia.org/wiki/Jewish_calendar#Measurement_of_....