Found this picture today when doing some research for Sunday.  Like it very much. Cannot cover every eventuality, but I don't think that's its aim.

We don't mark 'Mother's Day' or 'Mothering Sunday' in any significant way in our church (nor did we in my last) but we do try at least to acknowledge the diversity of authentic relationships and families that we are each a part of, as well as the glorious 'messy community' (to pinch a phrase someone else used) we are together.