You might even find it easier than using an app.
iOS World Clocks do require some attention to time zone fundamentals, but they mostly fall short in details. This iOS world clock from ozPDA, called Everywhere, fixes all that.
Graham Dawson is an iOS and Android indie developer who specializes in meteorological and astronomical reference apps. He’s the founder and director of Ajnaware Pty, Ltd in Australia and publishes apps under the name ozPDA. Graham holds a B.Sc. in physics and meteorology, and a Ph.D. in oceanography. Graham told me about his early interest in weather thanks to extreme conditions, especially snow. That’s because, in his youth, he was skiing in Switzerland. Soon he had a weather observation station in his backyard, and he could think of nothing else as he entered his undergraduate years. Today, he publishes a wide range of apps related to the sun, moon, wind, weather and time. Some feature augmented reality. Thanks to his academic background, these apps have rock solid computational credentials. Graham told me how it all came to be.