This study assessed associations between activity patterns during the 14 days prepartum and calving events in dairy cattle. Cows (n=136) that were between 20 and 30 days from expected calving date were fitted with a HOBO® accelerometer on the rear right leg. Cows that experienced a severe assisted calving spent more time lying down during the 14 days prior to calving compared to cows that experience either normal or mild assisted calvings.