Confused by time zones? You’re not alone, if family from out East calling me at 6 AM is any indication. I shouldn’t joke too much: I’ve made similar mistakes.

Whether you need to coordinate group meetings across continents or just need to know what time it is in Amsterdam before you call your friend there, these five websites should help reduce your confusion.

1. Hours Apart: Quickly Visualize Different Time Zones
At times you just need a quick comparison. Hours Apart is an easy way to get just that. Add as many cities as you like, and you will see the time in each.

It simple sure but it’s effective, and a great place to start if you’re coordinating a widespread team.

2. Time Map (Android, Free): Full Time Zone Map With Current Times
Sometimes it helps to see times in context. Time map shows you the time and all of Earth’s time zones simultaneously. This free Android app couldn’t be simpler.

3. XKCD’s Now: Comic That Functions as a World Clock
There’s a relevant XKCD for everything – even time zones. Comic 1335 isn’t so much a comic as it is an actual time zone tool, and it’s possibly one of the most useful ones on the web.

The outer ring stays the same, but the inner circle rotates throughout the day – letting you see roughly what time it is in different parts of the world. I’d pay to have this as an actual wall clock, but for now we’ll have to settle with going to XKCD.com/now.

4. Veern (iOS, Free): See What Time it is Where Your Friends are
Courtesy is more complicated when it involves math, as anyone with a friend in a different time zone can tell you. If that’s you, Veern is worth checking out. This simple app lets you add friends with time zone and contact information.

5. Miranda (iOS, Free): Simple Time Zone Clock With Scrolling
Sometimes you just want to quickly see a list of cities alongside the time, or adjust time quickly to get a comparison. Miranda is an iPhone app that lets you do just that.

You’ll see the current time right away, and can turn the wheel to scroll back and forth through time – perfect if you’re trying to schedule a meeting. Rotate your phone and you’ll see a quick visual letting you know where it’s day and where it’s night.