Unlike national elections, subnational levels of politics have rarely been the subject of research. The small number of investigations stem from the field of psephology. While these have supported the assumption that the national level exerts a time-dependent impact on regional voting behaviour, election campaigning's time-dependency has yet to be investigated. Against this backdrop, this article offers a unique longitudinal and quantitative investigation of election campaigns in Germany's federal states. Using campaign managers' perceptions as a basis, it discusses time-relevant effects on electoral campaigning with regard to the degree of regionalisation, emotionalisation, and personalisation.