What does "one day" mean here? Does it mean it takes just one day to do that or spend one day to do that or sth else?

"The challenge from the present sickness can be mapped out in its essential form:
One day to reach a small but robust list of reasons to continue to be."

Question

What does "one day" mean here? Does it mean it takes just one day to do that or spend one day to do that or sth else?

"The challenge from the present sickness can be mapped out in its essential form:
One day to reach a small but robust list of reasons to continue to be."

Answer

Here, "one day" likely means that it takes just one day to come up with a solid list of reasons to keep going. It emphasizes that the process of finding those reasons can be done within a single day.