Is there a specific time after getting Botox when the effects are most visible?

While researching Botox, I saw comments saying that changes are felt a few days after the procedure rather than immediately afterward.

In that case, I am curious if the point at which the effects start to appear and the point at which it feels most satisfying are also different.

For those who received it for the first time, when did you notice the changes most clearly? I am also curious how much time you allowed before getting it done if you had an important schedule.