Introduction: The aim of this research is to analyze the influence of time management, particularly in connection with university teachers' assigned class hours, on psychosocial factors relating to perceived health and stress symptoms. Special attention is given to the effect of very early and very late class hours. Method: The sample comprised 172 professors from the Polytechnic University of Catalonia (99 men and 73 women). A Spanish version of the ISTAS21 was used. Results: Professors whose classes were held in the early morning or late evening hours reported a less healthy perception of themselves and a larger number of stress symptoms. Results showed no difference related to gender, but significant differences were found in the gender-teaching shift interaction. Early/late class hours show a stronger effect on females. Discussion and Conclusions: A university professor's possibilities to arrange his or her work time, and so balance work and personal life, have an impact in preventing illnesses and stress symptoms. It is not so much a question of general time management as the avoidance of time conflicts with highly valued personal activities. This effect is most notable in the women in our sample, who show a preference for a female social role that gives priority to family. (Contains 3 tables and 2 figures.)