Lily & Petunia, who's older?

[greg_a126]

No: HPFGUIDX 41937

Based on the fan fiction out there, it seems to me that a great 
majority of people think that Petunia is the oldest.  I'm wondering 
if there's any evidence from canon about that.  B/c if not, then I 
think it's much more likely that Lily is a few years older.  Think 
about it.  Lily gets her letter when she's 11.  The whole family 
goes off to Diagon Alley, and everyone, including Petunia, falls in 
love with the magical world.  For the next two or 3 years until 
Petunia turned 11, all her parents talked about was the day that 
she'd get her own letter.  Then, the whole summer of her 11th year 
goes by & no letter for Petunia.  Rather than admit that the magical 
world rejected her, she decides to reject the magical world by 
hating all things magical, including her nephew who even at a young 
age showed he had the gift she never did.  I think that scenario 
makes more sense than the jealous older sister bit, but maybe that's 
just me.

Thoughts?
Greg