Today is the final day of Higan week, the three days before the equinox and the three days after. As explained in a Nichiren Shu brochure:

For Buddhists, this period is not just one characterized by days with almost equal portions of light and dark. Rather, it is a period in which we strive to consciously reflect upon ourselves and our deeds.

The today we consider the Perfection of Wisdom.

Several realizations make wisdom more difficult to imagine than the other five ideals we have examined. Wisdom differs from the others in the extent to which it is readily identifiable and noticeable. When we look for acts of generosity, morality, tolerance, energy, and meditation, we know roughly where to look. Acts of generosity, for example, are located in a certain sphere of our lives; they are easily identified wherever something beneficial is intentionally and freely transferred from one person or group to another. But where do we look to find examples of wisdom? Nowhere in particular, or anywhere. There is no specific domain of wisdom. You can be wise or unwise in any dimension of life. Wisdom can be found at work in all of the other perfections and in everything we do, rather than in its own domain. There is wise giving, wise tolerance, wise eating, wise shopping, and so on. Wisdom appears at a more comprehensive level than the other perfections, and this is how it can guide, encompass, and perfect the other perfections.