What causes weekness?

Answer 1

The usual cause of weekness is time passing by after several days. As they accumulate they tend to get forgotten, so we created weeks made of seven days to help us keep track of them. Then there just got to be too many weeks so that caused us to create months to keep track of the days; that were becoming weeks, and the weeks becoming months, and then years. So, the answer may just be time. So really, time is the cause of weekness.