"The crickets felt it was their duty to warn everybody that summertime cannot last forever. Even on the most beautiful days in the whole year - the days when summer is changing into autumn - the crickets spread the rumour of sadness and change." — Charlotte's Web, E.B. White
It's that time, swans — the time it always is (oh! change) but sometimes, like a frog in a pond, that time is clearer to see.