Banker's Hours

Every now and then, I'll hear somebody at work use the term "banker's hours" jokingly. I'm not entirely sure what it means, but based on the context, I'm pretty sure it's a way of making fun of someone for leaving earlier than usual.

For example, if I see Bob taking off in the early afternoon at maybe 2 or 3 (our normal workday ends at 4:30pm), I might say "Hey Bob, keeping banker's hours, eh?" To which he would probably smile politely and make up some excuse for why he's leaving early.

I know, it's pretty dumb, and not that funny, but people actually say it pretty often around here. At least it's better than saying "touch base" all the time. There's this girl who sits near me and I hear her say it every single day. Makes me want to punch someone.

Anyways, what I think is funny is how bankers apparently got the reputation of being lazy and having a short work day, to the point that "banker's hours" actually became a term. Sorry Anuj, it's true.

It also makes me wonder, if engineers make fun of bankers for leaving work early, what do people in other professions say in similar situations? Like if a banker sees a fellow employee going home around noon, would he/she say "hey, keeping Kindergarten teacher's hours, eh?"

Or on the other side of things, say a Japanese businessman wants to leave the office earlier than usual, does he/she have to worry about a colleague making a derisive comment like "hey, keeping electrical engineer's hours, eh?"