Q: White jeans? Alright for a straight man to wear? If so, is there a specific time of the year they are acceptable?
A: Short answers: Yes. Of course. Not really.
We don't know where the notion that only gay men can wear white jeans came from, but we don't like it one bit. They're a required item in any Magnificent Bastard's closet. White jeans, a cool tee or polo, and non-plastic sandals or flip-flops ... that's rocking the shit no matter if MB prefers dudes or chicks.
Regarding timing, old school says Memorial Day to Labor Day. In this case, old school is wrong. It takes a certain degree of confidence and "I don't care what anyone thinks" mentality (MBs have both of these in spades), but even if you're not a rock-n-roller you can wear white jeans to a May Day parade and to the final regular season MLB baseball game. Check your favorite team's schedule.
(Incidentally, the jeans pictured are AG Protege fit. They're Tony the Tiger great. Available only in stores.)