Do you need a birthday for divination?

Six hexagrams are divination, and there is generally no need for a birthday. Time-assisted analysis of divination. Of course, some people also divide people, and some people watch Liu Yi and refer to birthdays for some things. For example, asking for a disease, six hexagrams are very heavy, and there is no hope in the hexagrams. People who care very much may also look at each other's birthdays to help analyze.