In [1]:

    

import datetime


    

In [2]:

    

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


    

In [3]:

    

print(dt_naive)


    

    




2018-12-31 05:00:30.001000

In [4]:

    

print(dt_naive.tzinfo)


    

    




None

In [5]:

    

dt_aware = datetime.datetime(2018, 12, 31, 5, 0, 30, 1000,
                             tzinfo=datetime.timezone.utc)


    

In [6]:

    

print(dt_aware)


    

    




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

In [7]:

    

print(dt_aware.tzinfo)


    

    




UTC

In [8]:

    

print(type(dt_aware.tzinfo))


    

    




<class 'datetime.timezone'>

In [9]:

    

print(datetime.timezone.utc)


    

    




UTC

In [10]:

    

print(type(datetime.timezone.utc))


    

    




<class 'datetime.timezone'>

In [11]:

    

print(issubclass(type(datetime.timezone.utc), datetime.tzinfo))


    

    




True

In [12]:

    

tz_jst = datetime.timezone(datetime.timedelta(hours=9))


    

In [13]:

    

print(tz_jst)


    

    




UTC+09:00

In [14]:

    

print(type(tz_jst))


    

    




<class 'datetime.timezone'>

In [15]:

    

tz_jst_name = datetime.timezone(datetime.timedelta(hours=9), name='JST')


    

In [16]:

    

print(tz_jst_name)


    

    




JST

In [17]:

    

dt_utc = datetime.datetime(2018, 12, 31, 5, 0, 30, 1000,
                           tzinfo=datetime.timezone.utc)


    

In [18]:

    

print(dt_utc)


    

    




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

In [19]:

    

print(dt_utc.tzinfo)


    

    




UTC

In [20]:

    

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


    

In [21]:

    

print(dt_jst)


    

    




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

In [22]:

    

print(dt_jst.tzinfo)


    

    




UTC+09:00