How to create time-zone aware date-time instances.

Datetime_with_timezone.py

# coding: utf-8
"""
How to create time-zone aware date-time instances.
"""

__author__ = "Caleb P. Burns"
__license__ = "CC0 1.0 Universal (CC0 1.0) Public Domain Dedication"
__version__ = "1.0.1"
 
import datetime

try:
	import dateutil.tz
	utc_tz = dateutil.tz.tzutc()
	local_tz = dateutil.tz.tzlocal()
except ImportError:
	import tzlocal
	import pytz
	utc_tz = pytz.utc
	local_tz = tzlocal.get_localzone()

# Get date-time with local time-zone.
local_aware = datetime.datetime.now(local_tz)

# Get date-time with UTC time-zone.
utc_aware = datetime.datetime.now(utc_tz)

# Convert naïve local date-time to local time-zone.
local_naive = datetime.datetime.now()
local_aware = local_naive.replace(tzinfo=local_tz)

# Convert naïve UTC date-time to UTC time-zone.
utc_naive = datetime.datetime.utcnow()
utc_aware = utc_naive.replace(tzinfo=utc_tz)

# Convert naïve UTC date-time to local time-zone.
utc_naive = datetime.datetime.utcnow()
utc_aware = utc_naive.replace(tzinfo=utc_tz)
local_aware = utc_aware.astimezone(local_tz)

# Convert naïve local date-time to UTC time-zone.
local_naive = datetime.datetime.now()
local_aware = local_naive.replace(tzinfo=local_tz)
utc_aware = local_aware.astimezone(utc_tz)