using pytz to get local timezone name

Question

I would like to use datetime and pytz to get current local timezone name like 'US/Easter' not 'EST' or 'EDT' No tzlocal module. How can I do it? all i have are like following but both are turn into 'EDT

from datetime import datetime
from dateutil.tz import tzlocal
import pytz
from pytz import reference
now = datetime.now()
localtime = reference.LocalTimezone()
print(localtime.tzname(now))
print(datetime.now(tzlocal()).tzname())