Li Minghe Yao Lu went to the library to borrow books. Li Ming goes every four days, and Yao Lu goes every six days. On July 5, the two met in the library. What month?

Li Ming, one of them goes once every four days and the other once every six days. Take the least common multiple of these two values, which is the period when they walk together. The period is 12 days. They meet every 12 days, so they meet again on July 17.