ZoneInfo class in Python

Overview:

The ZoneInfo class represents an IANA timezone.
The ZoneInfo class is intended to work with a DateTime instance.
When a DateTime instance is created with a ZoneInfo object it supports the IANA timezone as well as the daylight saving time.

Example:

# Example Python program that converts
# a time from one timezone to another
# using ZoneInfo class
from zoneinfo import ZoneInfo
from datetime import datetime, timedelta

# Create an instance of ZoneInfo
ianaTimeZone = "America/New_York";
timeZone = ZoneInfo(ianaTimeZone);

# Specify date and time
year    = 2021;
month    = 1;
date     = 1;
hours    = 13;

# Create a datetime instance with a given ZoneInfo
regionalTime = datetime(2020, 12, 31, 13,
tzinfo = timeZone);
print("Time in %s:"%ianaTimeZone);
print("%s %s"%(regionalTime, regionalTime.tzname()));

# Create another instance of ZoneInfo
ianaTimeZone = "America/Chicago";
timeZone = ZoneInfo(ianaTimeZone);

# Convert from one time zone to another time zone zone
newTime = regionalTime.astimezone(timeZone);
print("Time in %s:"%ianaTimeZone);
print("%s %s"%(newTime, newTime.tzname()));

Output:

Time in America/New_York:
2020-12-31 13:00:00-05:00 EST
Time in America/Chicago:
2020-12-31 12:00:00-06:00 CST