import feedparser
import io
import html
import datetime
import requests
import time

url = r'https://www.xboxygen.com/spip.php?page=backend'

html_text = requests.get(url).text
news = feedparser.parse(html_text)

yesterday_6am = datetime.datetime.now(datetime.timezone.utc).replace(hour=6, minute=0, second=0, microsecond=0) - datetime.timedelta(days=1)

try:    
    new_posts = [entry for entry in news.entries if datetime.datetime.strptime(entry.published.replace('GMT', '+0000'), '%a, %d %b %Y %H:%M:%S %z') > yesterday_6am]

except:
    new_posts = [entry for entry in news.entries if datetime.datetime.fromtimestamp(time.mktime(entry.updated_parsed)).replace(tzinfo=datetime.timezone.utc) > yesterday_6am]
    #else if 
    #entry.updated.replace('GMT', '+0000'), '%a, %d %b %Y %H:%M:%S %z'
    
print(new_posts)