A, dobra, już znalazłem - heavens above:

URL = "https://www.heavens-above.com/whattime.aspx"
r = requests.get(url=URL)
data = r.content

for line in data.splitlines():
    line = line.decode("utf-8")
    tag = '<span id="ctl00_cph1_lblGST">'
    if tag in line:
        begin = line.find(tag) + len(tag)
        return line[begin:line.find('<', begin)]

Jakby ktoś chciał