Time perspective is crucial in adolescence and youth, when individuals make important decisions related to their present and future. The focus of this research was to use the six-factor short version Zimbardo Time Perspective Inventory (S-ZTPI) scale in a sample of adolescents and young adults, and to analyse its associations with decision-making, relational styles and engagement. A structural equation model of the effects of S-ZTPI on these variables was computed, and its psychometric properties were found adequate. The results underline that young people’s present orientation is associated with a relational style based on confidence in oneself and others, and with active engagement in terms of responsibility and trust in a better future. Our findings suggest a positive description of adolescents’ views, as they are able to enjoy the time they are living in without giving up their responsibilities for making a better world for the future.