email.utils.parsedate_to_datetime() should return None when date cannot be parsed

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-06-15.23:12:43.396>
labels = ['type-bug', 'expert-email', '3.10']
title = 'email.utils.parsedate_to_datetime() should return None when date cannot be parsed'
updated_at = <Date 2020-10-27.07:37:48.458>
user = 'https://github.com/timb07'

bugs.python.org fields:

activity = <Date 2020-10-27.07:37:48.458>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['email']
creation = <Date 2017-06-15.23:12:43.396>
creator = 'timb07'
dependencies = []
files = []
hgrepos = []
issue_num = 30681
keywords = ['patch']
message_count = 18.0
messages = ['296137', '296141', '296153', '296154', '296215', '296226', '296231', '296235', '296361', '301618', '330628', '330648', '376384', '379381', '379412', '379464', '379706', '379742']
nosy_count = 8.0
nosy_names = ['barry', 'ncoghlan', 'r.david.murray', 'lukasz.langa', 'serhiy.storchaka', 'sim0n', 'timb07', 'miss-islington']
pr_nums = ['2229', '2254', '10783', '22090']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue30681'
versions = ['Python 3.10']