Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Problem:It is celebrated each year on 18 July ( Mandela 's birthday ) .
Solution:
Nelson Mandela International Day ( or Mandela Day ) is an annual international day in honour of Nelson Mandela , celebrated each year on 18 July , Mandela 's birthday .