In [1]:

    

import datetime


    

In [2]:

    

dt_jst = datetime.datetime(2018, 12, 31, 5, 0, 30, 1000,
                           tzinfo=datetime.timezone(datetime.timedelta(hours=9)))


    

In [3]:

    

print(dt_jst)


    

    




2018-12-31 05:00:30.001000+09:00

In [4]:

    

print(dt_jst.tzinfo)


    

    




UTC+09:00

In [5]:

    

dt_jst_to_utc = dt_jst.astimezone(datetime.timezone.utc)


    

In [6]:

    

print(dt_jst_to_utc)


    

    




2018-12-30 20:00:30.001000+00:00

In [7]:

    

print(dt_jst_to_utc.tzinfo)


    

    




UTC

In [8]:

    

dt_jst_to_m5h = dt_jst.astimezone(datetime.timezone(datetime.timedelta(hours=-5)))


    

In [9]:

    

print(dt_jst_to_m5h)


    

    




2018-12-30 15:00:30.001000-05:00

In [10]:

    

print(dt_jst_to_m5h.tzinfo)


    

    




UTC-05:00

In [11]:

    

dt_jst_to_utc_replace = dt_jst.replace(tzinfo=datetime.timezone.utc)


    

In [12]:

    

print(dt_jst_to_utc_replace)


    

    




2018-12-31 05:00:30.001000+00:00

In [13]:

    

print(dt_jst_to_utc_replace.tzinfo)


    

    




UTC

In [14]:

    

dt_jst_to_naive = dt_jst.replace(tzinfo=None)


    

In [15]:

    

print(dt_jst_to_naive)


    

    




2018-12-31 05:00:30.001000

In [16]:

    

print(dt_jst_to_naive.tzinfo)


    

    




None

In [17]:

    

dt_naive = datetime.datetime(2018, 12, 31, 5, 0, 30, 1000)


    

In [18]:

    

print(dt_naive)


    

    




2018-12-31 05:00:30.001000

In [19]:

    

print(dt_naive.tzinfo)


    

    




None

In [20]:

    

dt_naive_to_utc_replace = dt_naive.replace(tzinfo=datetime.timezone.utc)


    

In [21]:

    

print(dt_naive_to_utc_replace)


    

    




2018-12-31 05:00:30.001000+00:00

In [22]:

    

print(dt_naive_to_utc_replace.tzinfo)


    

    




UTC

In [23]:

    

dt_naive_to_jst_replace = dt_naive.replace(tzinfo=datetime.timezone(datetime.timedelta(hours=9)))


    

In [24]:

    

print(dt_naive_to_jst_replace)


    

    




2018-12-31 05:00:30.001000+09:00

In [25]:

    

print(dt_naive_to_jst_replace.tzinfo)


    

    




UTC+09:00

In [26]:

    

dt_naive_to_utc = dt_naive.astimezone(datetime.timezone.utc)


    

In [27]:

    

print(dt_naive_to_utc)


    

    




2018-12-30 20:00:30.001000+00:00

In [28]:

    

print(dt_naive_to_utc.tzinfo)


    

    




UTC