  Time and its lack of play a central role in our everyday lives. Despite
increasing productivity, many people experience time stress, exhaustion and a
longing for time affluence, and at the same time, a fear of not being busy
enough. All this leads to a neglect of natural time, especially the patterns
and rhythms created by physiological processes, subsumed under the heading of
chronobiology. The present paper presents and evaluates a calendar application,
which uses chronobiological knowledge to support people s planning activities.
Participants found our calendar to be interesting and engaging. It especially
made them think more about their bodies and appropriate times for particular
activities. All in all, it supported participants in negotiating. external
demands and personal health and wellbeing. This shows that technology does not
necessarily has to be neutral or even further current (mal-)practices. Our
calendar cares about changing perspectives and thus about enhancing users
wellbeing.
