The reason why anonymity is practiced is that the relationship between donor and receiver can be a difficult one especially for the families concerned. We have seen unfortunate examples of difficulties experienced in other countries. Both parties may have different motivations: receivers often have a desire to express gratitude and continue to live their lives, while the donors next-of-kin may build a lifelong relationship with the receiver of the donor as a consolation of their loss. This can be a psychological burden for both parties.
For this reason Oslo University Hospital, and The Norwegian Foundation for Organ Donation recommends that those receiving a transplant or the relatives of the organ donor(s) do not release the exact time of transplantation. The season and time of year is ok