 The study aimed to determine the temporal associations between smartphone online self-disclosure and critical indicators of psychological health during the first COVID-19 lockdown in Austria. The results revealed that fear of COVID-19 significantly predicted online self-disclosure and happiness over time, while online self-disclosure significantly predicted happiness, but not fear of COVID-19 or psychological well-being. Happiness and psychological well-being were significantly related over time. The findings suggest that online self-disclosure may play a pivotal role in coping with pandemic stressors and may help individuals experience more happiness during the crisis, which could potentially help them withstand the severe psychological consequences of the COVID-19 crisis over longer time frames. This article was authored by George Mathis, Kevin Coben, Ariadne Neurider, and others.