Full moons are not unexpected. However, they can be noteworthy. When two occur in the same month, the second one becomes a Blue Moon. The second full moon is the same as the first, but the sequence makes it unique.
Sometimes it is not what you do but when you do it. People donate goods and services every day. Often the impact is not evident because the effect is not visible. One can offer simple acts of kindness to their neighbor, taking out the trash, picking up a newspaper, holding a package until they return from a trip. However, if a neighbor suffers a catastrophe, the outreach from the neighborhood is palpable. Time of great need equates to more impact. Being prepared to act stands out. Sequence matters.