The "Best Days" column is based on the ever-changing positions of the sun and the moon, rating each day on a scale of 0 to 100. The higher the number, the more solar/lunar influence that day is experiencing (see "Value" column or corresponding black bars).

The "Lunar Periods" section lists the times the moon is overhead and underfoot each day. The length of a lunar period can range from one hour to three-and-one-half hours, depending on a number of important lunar cycles, such as how close the moon is to the earth that day and how high its orbit is. Also, the section uses solar symbols (see key at bottom of each month) to alert you when a lunar period is occuring at the same time as a solar period (eg, dawn, high-noon and dusk).