Not really. It depends what's happening with work and when I can get leave. Last year, my tickets were issued 2-3 weeks ahead of departure (but that also had some issues related to getting a new passport and processing name changes across many things).
I tend to start planning for my main holiday each year about a month after getting home from the last and have 2 or 3 options as to when to go. Once it's narrowed down to which dates are more likely to be approved for leave, it's normally all locked in about 6-8 weeks ahead.