Dieses Lied habe ich von Nina Kreft geliebt und gelernt!. A Hannes Wader song that she sang so beautifully, my job being to provide concertina chords.
The song actually is a German version of Indian Summer written by Gary D. Bolstad, a friend of Hannes Wader. The German words carry a quite different sentiment along the lines of:

Here today, gone tomorrow - nothing remains as it once was.

Lyrics