Carpe diem means 'Seize the day,' or by extension, 'the opportunity.' I seized my day and my opportunity. It was so beautiful, sunny, and warm the other day that I bought myself a popsicle and sat down on a bench downtown.
Looking up, I saw this worker in the art gallery on the second floor across from me who was seizing his opportunity to do some stretching and neck exercises.
Carpe diem.