![]() UTC is obtained by applying a set of algorithms to about 250 cesium clocks and hydrogen masers in roughly 65 different laboratories worldwide. UTC evolved from Greenwich Mean Time (GMT) for use as a standard and is maintained by the Bureau International des Poids et Mesures in Paris. Since time needs to be known and coordinated across the entire world, Coordinated Universal Time (UTC) is used as the standard absolute time reference. We’ll start with the standard time reference. ![]() “Records with a local date segment equal to user’s date segment”īefore we talk about using date and time data in MySQL, let’s review how time zones work.Is the information going to be sorted or filtered by its local time or by its UTC representation?.How is this data going to be displayed?.Does this data represent a point in time in the past or in the future?.Time zones and time offsets are not the same thing.It is important to notice that these concepts apply when representing a point in time rather than an absolute duration. Let’s first address some core concepts that will help us understand the underlying complexity of time-related data. We’ll also look at how to handle multiple time zones and daylight saving time changes. In this article, I’ll walk you through some fundamental considerations for working with date- and time-related data in MySQL.
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