![]() ![]() UTC was established in 1972 to compensate for the slowing problem of the Earth’s rotation. ![]() Many consider GMT and UTC the same thing, and the two are used interchangeably in many cases, but they are actually different. 5, 1925 and became the world time standard until Jan. GMT is an abbreviation for Greenwich Mean Time, which is the clock time at the Royal Observatory in Greenwich, U.K. The Korean local time is normally GMT +09:00. This sometimes results in such an awkward situation where the sun rises around 10:00 AM in the western part of China GMT, UTC, and Offset GMT Interestingly, even though China is large enough to have multi time zones, she uses only one time zone. It’s common for many countries to have its unique time zone, and some large countries, such as the USA or Canada, even have multiple time zones. What is Time zone?Ī time zone is a region that follows a uniform local time which is legally stated by the country. In this light, I will first discuss the definition and standards related to time zone in detail, and then talk about JavaScript. As I was writing this rather lengthy article, I suddenly realized that the root of my problem lied in my poor understanding of the time zone domain. The purpose of this article is to discuss the issues and solutions related to the implementation of time zone features using JavaScript. For this reason, I had a valuable and thrilling experience of solving a problem leading to cause more problems. Implementing time zone features beyond simple formatting of time and calculating time data with complex operations (e.g. However, my hope was false, and I found it really hard to handle time zone in JavaScript as I progressed more. I pretty well knew that the time zone support in JavaScript is quite poor, but hoped that abstracting existing data objects would easily resolve many problems. Recently, I worked on a task of adding a time zone feature to the TOAST UI Calendar, the JavaScript calendar library managed by my team. ![]()
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