Riddles

I do know who I am, but I am not. I have the glory of the sun but only one day in summer. I have the most appreciated life, have the applause and recognition.

But my life is as fleeting as a moment, a day, a night. But I want to be today an unceasing happiness. Who cannot like me, if I am the star of the firmament and I have brought clarity, to the night. I have life now, but I will not be, tomorrow.
Who am I?

The Disguise Costume.