Time Atlas World

Time Atlas World shows the current time in cities across every continent. You can search, filter and star the cities you check often, and switch between 12 and 24 hour display. It also has a time converter for comparing your local time with another city, and a meeting planner that shows business hours side by side so you can pick a slot that works for everyone. There is a reference page for zone abbreviations like PST, CET and IST, countdowns to holidays, and a business days calculator. If you run a website, there is a free clock widget you can embed. The site can be added to your phone's home screen and works offline. I built it because I kept doing time zone math in my head before calls. No signup needed.