Suggest you read the article at;
http://homepage.mac.com/andjames/PageVenus002.htm
Ephemeris
http://homepage.mac.com/andjames/PageVenus007.htm
The last paragraph talks about the
Ashen Light (seen it once or twice), prevalent during the thinnest of crescents.
Cheers
Encha
(I'll do an ephemeris based on times near sunup and sunset, so you can know the exact time, elevation, phase and elongation.)