Example gist showing how to convert numpy.datetime64 to astropy.Time for the use of sunpy.time.parse_time. Another (better?) example at https://gist.github.com/vn-ki/28edbc581b1218118b40df29855d1c6c.

dt64_to_astropyTime.py

"""
Example implementaion of parse_time to convert numpy.datetime64 to astropy.Time
"""

import numpy as np
from functools import singledispatch
from astropy import units as u
from astropy.time import Time
from datetime import datetime

# The logic is taken from here:
# https://github.com/astropy/astropy/issues/6428#issuecomment-362224248

DATETIME64_TO_UNIT = {
    'datetime64[W]': u.week,
    'datetime64[D]': u.day,
    'datetime64[h]': u.hour,
    'datetime64[s]': u.second,
    'datetime64[ms]': u.millisecond,
    'datetime64[us]': u.microsecond,
    'datetime64[ns]': u.nanosecond,
    'datetime64[ps]': u.picosecond,
    'datetime64[fs]': u.femtosecond,
    'datetime64[as]': u.attosecond,
}


@singledispatch
def convert_time(time_string):
    return time_string  # This is incomplete becuase it is an example


@convert_time.register(np.datetime64)
def convert_time_npdatetime(time_string):
    """
    Handle when time_string is np.datetime64
    """
    if time_string.dtype.name in ['datetime64[M]', 'datetime64[Y]']:
        time_string = time_string.astype('M8[D]')

    return Time(
        time_string.view('i8') * DATETIME64_TO_UNIT[time_string.dtype.name],
        format='unix')


@convert_time.register(np.ndarray)
def convert_time_ndarray(time_string):
    """
    Handle when time_string is np.datetime64
    """
    # Another way to do this would be:
    # return Time([convert_time_npdatetime(dt) for dt in time_string])
    # astropy.Time supports arrays
    return np.array([convert_time_npdatetime(dt) for dt in time_string])