This week is a Palindrome Week - that means that each date this week can be read the same way backwards and forwards. For instance, today is 6/16/16 - 61616.
In the Dewey Decimal System, there are also palindromes. There are several legitimate Dewey Decimal Numbers that read the same backwards and forwards:
976.679: Le Flore County, Oklahoma
331.4133: Women's Rights
363.7363: Management of Pollution in the Environment
621.3126: Energy Storage in Engineering
And of course,
331.890410263362014098133: labor-management bargaining and disputes in libraries devoted to local taxes, in Paraíba state, Brazil.