Is the Munich Hbf Left Luggage storage facility operational 24 hrs?
I have a night train to Venice on a Sunday night at 11 30PM and would want to claim my bag at 9PM from the storage section that I intend to deposit in the morning.
Ja, die Schließfächer im Münchener Hbf sind rund um die Uhr zugänglich
That says the lockers in Munich HBF are accessible 24 hours a day.
According to the Deutsche Bahn AG railway information, the railway station is open 00:00–24:00 daily, and the station has Schließfächer, i.e. luggage lockers.
Luggage lockers at München Ostbahnhof (Source: Münchenwiki, GFDL). Lockers at Hauptbahnhof will look similar.
So, with an unmanned luggage locker, you can put away or retrieve your luggage at any time.
There are two types of luggage storage facilities in Munich Haptbanhof: short-term lockers, and long(ish)-term storage. The lockers are unmanned, and hence I assume that they are accessible 24-hours, or at least during the opening hours of the train station. On the other hand the long-term luggage storage service is manned from 08:00 - 20:00 (Monday - Friday) and 08:00 - 18:00 (Saturday, Sunday and Public Holidays), according to the SNCF webpage on Munich Hauptbanhof:
The station has a Left Luggage office which you can find via the ticket hall. Opening hours: 08:00 - 20:00 (Monday - Friday) and 08:00 - 18:00 (Saturday, Sunday and Public Holidays). Luggage lockers are also available. Lost property facilities are offered at the station and can be located via the ticket hall.