Custome day start and end

count_custome_day_start_and_end.py

import pandas
import numpy
import datetime as dt

def custome_days(pd_DateTime64, hour=00, min=00, sec=00):
    time_1 = dt.timedelta(hours=00, minutes=00, seconds=00)
    time_2 = dt.timedelta(hours=hour, minutes=minute, seconds=second)
    return (pd_DateTime64 - (time_2 - time_1))

Result.md

Inpute

DatetimeIndex(['2021-10-10 07:47:00', '2021-10-10 07:47:00',
               '2021-10-10 07:47:00', '2021-10-10 07:47:00',
               '2021-10-10 07:47:00', '2021-10-10 07:47:00',
               '2021-10-10 07:47:00', '2021-10-10 07:47:00',
               '2021-10-10 07:47:00', '2021-10-10 07:47:00',
               ...
               '2021-10-17 09:07:00', '2021-10-17 09:07:00',
               '2021-10-17 09:07:00', '2021-10-17 09:07:00',
               '2021-10-17 09:07:00', '2021-10-17 09:07:00',
               '2021-10-17 09:07:00', '2021-10-17 09:07:00',
               '2021-10-17 09:07:00', '2021-10-17 09:07:00'],
              dtype='datetime64[ns]', name='Date_Time_1', length=8144, freq=None)

Output

array([0, 0, 0, ..., 8, 8, 8], dtype=int64)