People across continents begin their day as the sun rises, with the average wake-up time gathering around 7:00 am local time. By 9:00 am, the majority of the world's population is active and engaged.

The Foreign Office has cautioned UK holidaymakers that they risk being barred from European getaways for up to three years.

The U.S. military uses 24-hour military time to avoid confusion between a.m. and p.m. The Navy started using it in 1920, and ...