Using three waves of the European Working Conditions Survey (2005-2015), we examined parental work schedules and hours across welfare regimes covering 29 European countries with attention to gender and socioeconomic gaps (N = 20,648). Multivariate logistic regression results revealed that: (1) nonstandard work schedules and overworking were more prevalent in the Liberal, Southern European, and Central-Eastern European regimes than were in the Corporatist and Social Democratic welfare regimes, whereas underworking was the highest in the Liberal and Corporatist regimes; (2) fathers were more likely to work nonstandard schedules and overwork but less likely to underwork than were mothers, with the strongest gender gaps observed for the Liberal regime; (3) highly-educated parents were less likely to work nonstandard schedules and overwork but more likely to underwork, and this was more pronounced in the Southern European and Central-Eastern European welfare regimes; (4) compared to 2005, nonstandard work schedules were more prevalent in 2015, and both overworking and underworking were less prevalent in 2010; these trends varied across welfare regimes.