Bay Area here. No real hours however "business hours" are 9 to 5, that generally means any meetings need to be within that time frame (ideally actually more lik

Bay Area here. No real hours however "business hours" are 9 to 5, that generally means any meetings need to be within that time frame (ideally actually more like 10 to 4). It is common courtesy to also not schedule 12-1 for lunch, but that gets thrown out the window a lot and so working lunches are the norm. Even if I don't work through lunch, I usually only take 20 min or so. Most people are in the office (when they are actually in the office, which isn't often these days), from 9ish to 5ish. I've worked at many companies that offered dinner at 7 to encourage people to stay late, but that only seems to have the effect of having people start later. No one really tracks hours as long as the work is getting done. Plenty of time I'll cut out of work around 2pm for something and then check in later in the evening for a couple hours. General trend is people in their 20s work longer and later. Most people over 30 at any tech company I've worked at are out the door before 5. But also people over 30 tend to more reliably be in the office at or before 9.