import ssl
import socket
from datetime import datetime

def get_ssl_expiry_date(hostname, port=443):
    context = ssl.create_default_context()
    with socket.create_connection((hostname, port)) as sock:
        with context.wrap_socket(sock, server_hostname=hostname) as ssock:
            cert = ssock.getpeercert()
            # 取得過期日期並轉為 datetime 格式
            expiry_str = cert['notAfter']
            expiry_date = datetime.strptime(expiry_str, '%b %d %H:%M:%S %Y %Z')
            return expiry_date

# 測試
hostname = 'tw.yahoo.com'
expiry_date = get_ssl_expiry_date(hostname)
print(f"{hostname} 的 SSL 憑證到期日是：{expiry_date}")