Over the holidays, I built a simple habit tracker that lets you track any event's start and end time.<p>In the process, I upgraded my personal homepage to Next.js 15, added Payload CMS and NextUI, and experimented with React Server Components and Actions.<p>Check it out: <a href="https://mojica.de/tracker" rel="nofollow">https://mojica.de/tracker</a><p>You can create new event types by entering activities in the top text field. Events are automatically started for new types.