This document describes a calendar network service for running, swimming, triathlon, and fitness coaches/trainers as well as running, swimming, and cycling clubs and retailers. The service allows users to contribute their activities and events to a community calendar network that can then be published to their own website, the community network, and social media pages. It offers group, community, and mobile views of the calendars and helps users share and promote their activities and brands widely within the athlete community while controlling their calendars from a central location.