Yahoo mail time stamps - how to read

[Tonks]

Does anyone understand how to read the time that an e-mail message 
comes in? I had a long chat session with someone from Yahoo and know no 
more than when I started. I figure that someone here, maybe Steve, 
might know the answer better than they do.

If when I look at the inbox it says 11-9-07 and when I open the e-mail 
it says 11-10-07. Why is that? The message came from somone in Europe. 
And what does 7:50:33 +0300, mean in real English for someone in the 
EST time zone?  Another message sent from the U.S. says 6:35:55 -0500. 
What does THAT mean in real English for someone in the Eastern Time 
Zone? The person at Yahoo could not give me a straight answer. They 
kept saying that they were not in my time zone, Yahoo is in the PST 
time zone and so this idiot could not help me. 

I am sure someone here can. Help! Thanks.

Tonks_op