When did you start putting the baby to bed?

Hello! Am just curious at what age others have started putting their babies to bed with a monitor and carrying on their evening in another room/downstairs etc?

In the UK the advice is that we sleep with baby for at least six months, so I assume it might be sometime after that? Our girl is 10 weeks old at the moment, so am aware it won’t be for a while.

Just gathering how others have managed this transition.

Edit: Thanks everyone. Loads of comments and thoughts. And so incredibly varied. Ranging from first night at home to a year old. The most common appears to be between the 4-6month mark so I think we might lead with that.