The phrase "a year and why" is not correct and lacks clarity in written English.
It may be used in contexts where you are asking for a reason related to a specific year, but it needs more context to be fully understandable.
Example: "Can you explain your choice of a year and why it is significant?"
Alternatives: "a year and the reason" or "a year and the explanation".
Many London Underground drivers now earn more than £50,000 a year, and why not?
I have seen only a small bit of it, but the rest of it beckons, the very names: Great Slave Lake, Yellowknife, Moose Jaw, down through Alaska — months of it, maybe a year, and why not?
Tom Nixon, one half of the Brighton-based social media agency Nixon McInnes, was left to defend the more rational 'I'd quite like a little bit of life outside work' argument, explaining how he has an employee who works from the US for 12 weeks a year, and why it's not sustainable to have staff working on full steam the whole time.
That raw fact impelled Mr. Obama to explain to them personally why he had ordered the Guantánamo Bay prison to be closed within a year and why he suspended military trials until his administration figured out how to prosecute the remaining terrorism suspects.
(In which case, why was Voxer in the clear for a year, and why have a developer platform in the first place?).
Later, Duffy told her that the real question should be why individuals cannot delay Obamacare for a year and why Obama is not enrolled in the exchange.
That's why they pay him eight million dollars a year — and also why everyone who doesn't own a hockey team dislikes him even more than they did before.
"They think it is going to be a Democratic year, and why end their career on a loss?" The retirees themselves are looking ahead to their own new opportunities.
In the UK context, that would mean firms reporting what percentage of their profits they have paid in tax in a given year – and why it's lower than the headline rate (eg because of mind-blowingly complex avoidance schemes involving a string of subsidiaries in tax havens).
Of his first apartment, he said, "It's the type of building where young couples come in and move out in a year and I wonder, why am I still here?" It wasn't easy for him to separate from the Culkin clan, he recalled, "but it was time to downsize".
If Kris isn't doing paid labour at the workshop, his mother wants to know why he gets a pay stub, a T4 slip each year, and why EI contributions are deducted from his meagre cheques?
