Does digital divination need to consider the lunar calendar and the sun?

No need. One of the methods of digital divination:

1. Prepare 50 sticks, representing 50 geese.

Take out one to represent the one who escaped.

Then put the remaining 49 sticks between your fingers and take out some more.

The process is very complicated, and finally the remaining sticks can correspond to different hexagrams.

Take six coins and throw them one by one, heads and tails. Randomly arranged, and then read the hexagrams against the Zhouyi.