I voted "I think the poll is stupid". No one cares about which month an album is released, only the year. In fact, for many albums from the 70s, 60s, etc, people don't know in which month the albums were released. I mean that you can't find it in which month an album was released even if you google and research it, no one knows.
The release of an album in a certain month is accidental. Even though an album is already recorded, it has to be mixed and so on and it can only be released months after that. So due to certain schedule problems, it is accidental. The same is also valid for the year, but it has much less chance of it happening.
Now, if you are talking about classical music, even year becomes a problem. For so many works we don't know in which year a certain composition was made, we can only estimate.