There are scientists who state we're at the point where "we need to target the vulnerable" (rather than giving boosters to all over-12s) and that "there [is] no point in trying to stop all infections, and that at some point, society has to open up".
Professor Sir Andrew Pollard, chairman of the [UK's] Joint Committee on Vaccination and Immunisation is one of them.
The point when society has to open up is when there is enough community immunity that removing mitigations doesn't cause healthcare shortages due to staff infections or resource constraints. That's after Paxlovid is readily available or vaccine mandates have driven up vaccination rates, not today.
> The point when society has to open up is when there is enough community immunity that removing mitigations doesn't cause healthcare shortages due to staff infections or resource constraints [..]
Currently many staff shortages are being made much worse by public health policy, not Covid19 itself, in that otherwise healthy staff being forced to stay away from work to comply with quarantine requirements.
These requirements are now being relaxed[0], which is a good thing, but at some point the requirements need to go back to how the world worked before Covid which is approximately "if you're sick, please stay at home; if you're healthy, please come to work".
Judging by my vaccine confirmation (same system), it's when the certificate was created. In my case the timestamp points to a day after I've received my dose.