What does shakespeare mean by and summer lease hath all too short adate?

The line "And summer's lease hath all too short a date" means that summer passes by too quickly. Shakespeare is lamenting the fleeting nature of time and the fact that humans have so little time on Earth. He is also commenting on the beauty of summer and how it is such a joy to experience life and pleasure during this time of year. However, he knows that summer will soon come to an end, and he wants to make the most of it while he can.