def METHOD_NAME(f, mid):
  merge_year_np  = np.array(f.variables['merge_year'][mid])
  merge_month_np = np.array(f.variables['merge_month'][mid])
  merge_day_np   = np.array(f.variables['merge_day'][mid])
  merge_hour_np  = np.array(f.variables['merge_hour'][mid])
  merge_min_np   = np.array(f.variables['merge_min'][mid])
  valid_time     = dt.datetime(merge_year_np,merge_month_np,merge_day_np,merge_hour_np,merge_min_np,0)
  return valid_time