Funny...
There is only this present moment.
All the time.
Everything that is, is in this present moment.
Enjoying our lives also happens in this present moment.
When we are "happy" we are happy in this present moment again...
On the other hand we learn to leave this present moment
or something in us believes, we can leave this present moment,
because in reality we still are there.
We seem to do it to protect ourselves from pain and unpleasant experience.