[aeyes]

Because it works both ways, there are a lot of companies which offer "unlimited vacations" on paper. In theory you could use that to only work 3 days per week. In practice the employer will just argue that you don't meet expected performance goals (even if you do).

I work at a company which doesn't have any hours in the contract. People are active from 10-7 in general. This is the time where you have most overlap with your team and usually you have some dependency on others. If you aren't available you are letting your team down and again - you'll be flagged for not meeting performance goals.