On 08/04/2018 12:22, Mike Clarke wrote:
On 08/04/2018 11:35, Brian Gaff wrote:
Question
If the sky is blue which of the following is true
Â* It is a sunny day
Â*Â* It is daytime
Â* It is cloudy.

Erm.
Â* Its actually the first one.

No, it could be a clear moonlight night when the sky could be quite
blue, Admittedly dark blue but still blue..

Once the sun has gone below the horizon the sky is still blue,
maybe with a reddish tinge, but it is no longer daytime.