Jalex23, what would be some common reasons? since I have collected & arranged my all documents in order to apply TRV & our planned trip was for Christmas holidays in Toronto. But now I am worried that the Visa officer might think why we intend to travel in harsh winter along with 3 kids. That's the reason I thought If I can schedule my trip on next year in April,2017. And submit the visa application with all supporting docs now itself. Hope you got the point