>>> from datetime import datetime, timedelta
>>> from zoneinfo import ZoneInfo
>>> t = datetime(2024, 10, 27, 1, tzinfo=ZoneInfo('Europe/London'), fold=0)
>>> str(t)
'2024-10-27 01:00:00+01:00'
>>> t2 = t + timedelta(minutes=30)
>>> t2
datetime.datetime(2024, 10, 27, 1, 30, tzinfo=zoneinfo.ZoneInfo(key='Europe/London'))
>>> str(t2)
'2024-10-27 01:30:00+01:00'

>>> t3 = t + timedelta(minutes=60)
>>> str(t3)
'2024-10-27 02:00:00+00:00'
>>> t3
datetime.datetime(2024, 10, 27, 2, 0, tzinfo=zoneinfo.ZoneInfo(key='Europe/London'))

>>> datetime(2024, 10, 27, 1, tzinfo=ZoneInfo('Europe/London'), fold=1)
datetime.datetime(2024, 10, 27, 1, 0, fold=1, tzinfo=zoneinfo.ZoneInfo(key='Europe/London'))
>>> str(datetime(2024, 10, 27, 1, tzinfo=ZoneInfo('Europe/London'), fold=1))
'2024-10-27 01:00:00+00:00'

>>> t1 = datetime(2024, 3, 31, 0, tzinfo=ZoneInfo('Europe/London'))
>>> t1
datetime.datetime(2024, 3, 31, 0, 0, tzinfo=zoneinfo.ZoneInfo(key='Europe/London'))
>>> str(t1)
'2024-03-31 00:00:00+00:00'

>>> t2 = t1 + timedelta(minutes=60)
>>> t2
datetime.datetime(2024, 3, 31, 1, 0, tzinfo=zoneinfo.ZoneInfo(key='Europe/London'))
>>> str(t2)
'2024-03-31 01:00:00+00:00'

>>> str(datetime(2024, 3, 31, 2, 0, tzinfo=ZoneInfo(key='Europe/London')))
'2024-03-31 02:00:00+01:00'