A live viewing is a screening of a concert in a cinema. The show is carried from the venue to theatres, so people who are not in the host city can watch it on a big screen with other fans. We like to think of it as one concert shared across many rooms, with each cinema acting as a local meeting spot. It sits somewhere between a night at a gig and a night at the movies, and it comes with its own rules.
Two kinds exist, and the difference matters. A live one is carried as the concert happens, so the screening falls at the same moment as the show. A delayed or recorded one is screened later from a recording, and you may see it called a delayed viewing or an encore screening. Both put a concert on a cinema screen, but they are different offers, and a listing usually says which one you are looking at. If it does not say, we would ask before paying.
Because a live one runs at the moment of the concert, the local start time can be very early or very late, and the screening can land on a different calendar day from the concert depending on where you are. That is why we would not convert the tour date ourselves. Read the announcement for your own city's date and time instead. The tour's own channels usually post the announcement, while the practical details, meaning participating cinemas, dates, times and prices, usually sit on a separate site the announcement links to. That site is normally the only place the full city list appears.
Before you buy, check whether the screening is the live one or a delayed one, which city and cinema it is in, and whether the run time includes anything beyond the main set, since some screenings carry extra footage and some do not. Etiquette can differ from a normal film too. Many live viewings allow light sticks, and some allow singing along while others do not, so treat it as an event with its own rules and let the announcement or the cinema tell you. One honest limit: the organiser and the cinema partners decide which cities get a screening, so there is no rule that a tour gets one at all, and a city that had one for a past tour is not guaranteed another.