def get_year_start(hyear):
''' calculate the year's julian and length
return: a tupple of the julian number for 1'st of Tishrey
and the length of the year
'''
hcal = HcalWrapper()
# get Julian for year start
hcal.set_hdate(1, 1, hyear)
jd_1_tishrey = hcal.get_julian()
hyear_length = hcal.get_size_of_year()
return (jd_1_tishrey, hyear_length)
