The cultural reproduction of group identities in a diasporic and transnational setting can be analysed by looking into the ways ritual celebrations are reconstituted. Muslim religious celebrations such as ramadan, 'id al-fitr, 'id al-adha, sha'bana, 'ashura, and 'id al-mulud are studied among Moroccan immigrant women in the Netherlands in order to see how far they are transformed upon migration. Migration is usually perceived in spatial metaphors. In the context of bodily motion, space is privileged over time. Yet, in this study it also appeared that the sense of time, the knowledge of time, the availability of time, and the rhythm of time can change upon migration. First, the cosmo-political aspects of time are analysed. Controlling the calendar is control over time. Second, the connection between temporal schemes and identity and ethnicity is considered. Third, the dominance of clock time is studied. In the situation of migration this division of free time and working time is no longer synchronous with sacred time. Moreover, celebrations have a specific rhythm that can be out of tune with the rhythm in the country of migration. Lastly, the connection between the rhythms of sacred and socio-cultural time and ritual and bodily practices is analysed.