It depends a lot on where you are and how much light the plants get.
The further north you are, the earlier it will start to flower, but can also depend on if it's on the north side of your house in the northern hemisphere and has the days cut short from shade.
In the southern hemisphere, the season is completely opposite, and we harvest in April/May.
Some years it can be a bit earlier or a bit later in the same location.
There is a lot of variables growing outdoors and the specs of the plant should be taken as a guideline, not gospel.