[madcaptenor]

My theory on why people use "xST" is that the word "standard" time sounds like it is the fancy official time.

When people say EST and mean EDT I'm tempted to just show up an hour late, if it's a meeting I don't want to go to.

[troad]

I like that theory! I think you're right.

[pomian]

EST = Europe Standard Time

[tempestn]

EST is Eastern Standard Time. Most of Europe is on CET or CEST depending on time of year. (Somewhat confusingly, the 'S' in that case refers to Summer rather than Standard!)

[madcaptenor]

OK, I'll assume they meant that when they really meant US Eastern time and I'll be six hours early.