More than 20 years ago, McGrath and Beehr (1990) stated that temporal issues are at the core of conceptualizing and measuring stress. However, they observed that researchers at that time had devoted only limited attention to a temporal perspective. Since then, the number of studies incorporating temporal issues has increased notably. Generally, there is increased awareness among researchers that time is an important topic, and insightful papers have been published during the past two decades (Ancona, Okhuysen, & Perlow, 2001; George & Jones, 2000; Roe, 2008; Zaheer, Albert, & Zaheer, 1999). Moreover, research methodology has improved substantially. Most evident are the refi nements in experience-sampling and related approaches (Beal, 2012) and the more widespread use of longitudinal study designs (Sonnentag & Frese, 2012). These developments have helped to better understand temporal issues. In this chapter, we will provide an overview of research that addresses stress-related phenomena from a temporal perspective. However, although progress has been made, this chapter will also make evident that many questions remain unanswered and that we are more at the beginning than at the end of a very exciting journey.