@property
    def child_errors(self):
        return self.info[0] if self.is_group_error else None
This is the original way to calculate the julian day from the NREL paper.
dataset/ETHPy150Open nicolaiarocci/cerberus/cerberus/errors.py/ValidationError.child_errors--crossover with--dataset/ETHPy150Open pvlib/pvlib-python/pvlib/spa.py/julian_day_dt