# If you are using Python 2 (Windows)
pip install pytz
# if you are using Python 3 (Windows)
pip3 install pytz
# If the pip is not set as environment varibale PATH
python -m pip install pytz
# If you are using Python 2 (Linux)
sudo pip install pytz
# if you are using Python 3 (Linux)
sudo pip3 install pytz
# In case if you have to easy_install
sudo easy_install -U pytz
# On Centos
yum install pytz
# On Ubuntu
sudo apt-get install pytz
# If you are installing it in Anaconda
conda install -c conda-forge pytz