If you’ve done and put in the time and the preparation for some arbitrary project, you’ll feel comfortable, at ease and calm.
Before a massive event you should be feeling anxious.
Whereas, if you have done the work, you’ve done everything in the process that you can control to the best of your ability, then there isn’t any need to be nervous.
As the event draws closer the tensions will approach.
It is then you need become present and use them to your advantage.
All you have to do is execute.