It is generally assumed that national commemorations have the power to increase national attachment. This is because such ceremonies highlight shared history, communicate core values, and have the potential to decrease conflicts in societies, while celebrating and mourning together enhances attachment to the group. Remarkably, only a limited number of studies have empirically studied the relation between participation in national commemorations and feelings of national attachment. Studies that have addressed this question focused mainly on the intentions of the organizing elite, employed qualitative research designs, or suffered from methodological problems such as causality. In this study, we examined * Sabrina de Regt is an Assistant Professor of Sociology and member of the interuniversity Center for Social Science Theory and Methodology (ICS). Her research interests include democratic values, national commemorations, cohesion, and cross-national research. She has previously worked as a post-doctoral researcher on the project 'Freedom and Liberation Day in the Netherlands' in collaboration with the National Committee for 4 and 5 May, and as a fieldwork coordinator for the large-scale Survey of Health, Aging and Retirement (SHARE). Having earned master's degrees in sociology (2006, Tilburg University) and quantitative analysis in social ccience (magna cum laude,