World Time
Displays the real-time time of major cities around the world, useful for international collaboration.
Time Zone Division
The world is divided into multiple time zones, with the time difference in each zone usually measured relative to east or west longitude. Coordinated Universal Time (UTC) is the standard for all time zones, and local times around the world are adjusted based on the difference between the local time zone and UTC. The existence of time zones allows global activities and transactions to be coordinated at the right time.
Daylight Saving Time Impact
Many countries adopt Daylight Saving Time (DST) during the summer, moving the clock forward by one hour to make full use of daylight. This means that in the summer, some regions' time will be one hour ahead of standard time. However, not all countries observe DST, and understanding DST helps to accurately track global time.
International Date Line
The International Date Line (IDL) is located at 180° longitude, and it defines the area where the date changes. When you cross this line from west to east, the date decreases by one day; when you cross it from east to west, the date increases by one day. This line exists to ensure consistency in the global date system.