Because I’m sure not everyone knows (I, myself, am very rarely up-to-date on sports events, so I’m speaking from experience, ahem): tomorrow, the Vienna City Marathon is taking place, which means that quite a number of trams and buses won’t be operating on normal schedule.

You can find a list of all affected lines on the Vienna Transport Authority’s website. The website of the Vienna City Marathon provides the same information in the form of a four-page pdf document.