The December task is the loneliest one. Such a person receives little from the lineage: no support, no knowledge, no experience, no involvement. They start coping on their own early and usually take that for the norm.
This does not mean the lineage rejected them. Most often there was nothing to give: the line had run dry earlier, and the previous generations received nothing themselves.
The task here is to begin again. Not to establish who is to blame, but to become the first who has something to pass on — to accumulate, and not to repeat the emptiness.
It is fulfilled by the next people in the lineage receiving more than they themselves received.