Gloaming.

The French called this time of day "l'heure bleue."  To the English it was "the gloaming."  The very word "gloaming" reverberates, echoes - the gloaming, the glimmer, the glitter, the glisten, the glamour - carrying in its consonants the images of houses shuttering, gardens darkening, grass-lined rivers slipping through the shadows. During the blue nights you think the end of the day will never come. As the blue nights draw to a close (and they will, and they do) you experience an actual chill, an apprehension of illness, at the moment you first notice; the blue light is going, the days are already shortening, the summer is gone.  

Joan Didion