the easy solution:
Install this: http://www.stefanbion.de/htmlwindow/
and add a link to the desktop with this target:
C:\HtmlWindow\HtmlWindow.exe "Kalender" "https://calendar.google.com/calendar/r" 3600
The not so easy solution:
Install selenium: pip install selenium
Download the geckodriver from https://github.com/mozilla/geckodriver/releases
and put it somewhere in your path.
from selenium import webdriver
driver = webdriver.Firefox(executable_path='C:\ImPfad\geckodriver.exe')
driver.get(r"https://www.google.de/")
driver.save_screenshot(r"C:\Users\Me\Desktop\Kalender.png")
driver.quit()
(tested)
But there is an open issue: When the page need credentials (login, password), you have still a problem.