It is the combination of the time zone and daylight saving rules, along with the timekeeping services, which determines the legal civil time for any U.S. location at any moment. The clocks run by NIST & USNO are kept synchronized with each other as well as with those of other international timekeeping organizations.
The capital of Slovakia is Bratislava.
I believe your answer is the year 2020
Australia is referred to as an island
Something must have been moving along and either plowed the stuff to one side or carried it and deposited it along the side. What else but a glacier?
PS. I'd guess this is more the province of geologists, not geographers
