Time Zone Abbreviations: Why They Can Be Misleading
A few letters can mean different things in different places. Here’s how to avoid the mix-up.
“Let’s meet at 9 CST” sounds clear—until someone asks which CST you mean. The same abbreviation can be used in different parts of the world, so a few letters may leave room for a very long misunderstanding.
Give people a place
For an invitation, a city and a date are usually easier to understand: “9:00 in Chicago on Tuesday”, for example. If you include a second local time, check it for that date; the difference can change when clocks move forward or back.
Calendar software may use names such as Europe/Amsterdam. These named time zones let it look up the rules for the place and date instead of guessing what an abbreviation means.
You can check a meeting time with the Time Zone Converter. Take a look at the date in the result as well: it might already be tomorrow for the person you’re calling.
Curious about the numbers behind those names? The guide to time zones and UTC offsets explains the difference.