def h12(lat, lon):
"""Returns h12 identifier corresponding to the given identifier.
:param lat: latitude
:type lat: float
:param lon: longitude
:type lon: float
:return: datetime object for that year on the first day at midnight
"""
return h3.geo_to_h3(lat, lon, 12)
def test1():
assert h3.geo_to_h3(37.7752702151959, -122.418307270836, 9) == '8928308280fffff'