Doesn't putting the answer in a comment spoil the fun for those who have not yet solved it? If possible, I would suggest that you delete your comment. Why do you think the Answer and the Solution are hidden by default?

The year 1978 is such that the sum of the first two digits and the latter two digits is equal to the middle two digits, i.e. 19 + 78 = 97. What is the next year (after 1978) for which this is true?