Overlapping Timezone Panel
When working in a remote team in differentes timezones, I always end up with problems to do time math. But now I'm using this website that gives me a very nice overview about different timezones that are relavant, with a really helpful overlapping view! They also offer a mobile version.
World Clock & Time Converter
Effortless time conversion and world time. Schedule conference calls, webinars & online meetings, plan travel and track flight arrival time across time zones.