As per the saying गावो विश्वस्य मातरः, cows have the status of mothers because they give all humans milk like mothers.
Our tradition is to do special Go Puja on the occasion of Mattu Pongal after Uttarayana. Those unable to have cows at home can do at the nearby goshala. If even that is not possible, one can keep a vigraha or picture at home and do puja.
Such punyakala-s are a good occasion to help goshalas as per our ability.
A laghu puja paddhati, and a more detailed puja paddhati for those who are able, is released in multiple scripts for Go Puja.
Jaya Jaya Shankara Hara Hara Shankara