Every day is a world book day with my family. At 79 I still read before I get up, and before I put the light out at night and always have books on the go during the day too. Whenever we moved one of the first day important jobs was always to find the local library and to get a ticket for us all. The library is also the place where you find out about whatever interest you have so would find out about choirs and gardening clubs etc etc,
As to books that were special when my son was little were The tiger who came to tea, the very hungry Caterpillar, and of course the great Each Peach Pear Plum, which was also popular in schools when I was teaching. I even remember one of my favourite books from many years ago was The Secret Garden and then a vey old book called The Girl of the Limberlost. Plus Jane Eyre , which the fire scene frightened the life out of me when reading it late at night when I was meant to be asleep about the age of 8. Oh the joy of books for every age. Keep enjoying them at every age.