Patent ID: 7251198

Claim:
A moon phase wheel chart, for determining the phase of the moon for a particular date, comprising: a first member, a second member, and a third member, each of a generally circular shape adapted to rotate about a common center; where. the first member has at least one first indicia thereon located a constant first radii from the common center, each of the flint indicia representing a particular phase of the moon, and at least one second indicia thereon located a constant second radii from the common center, each of the second indicia represesnting a particular thousands and hundreds digit of a year; the second member is atop the first member and has at least one third indicia thereon located a constant third radii from the common center, each of the third indicia representing a particular tens and ones digit of the year and at least one forth indicia thereon located a constant forth radii from the common center, each of the fourth indicia representing a particular month of the year; the third member is atop the second member and has at least one fifth indicia thereon located a constant fifth radii from the common center, each of the fifth indicia representing a particular day and a sixth indicia thereon; and such that for a month and a year of interest, the second member is rotated so that the respective third indicia that we resents the tens digit and ones digit of the ear of interest is aligned with the respective second indicia that represents the thousands digit and the hundreds digit of the year of interest, the third member is rotated so that sixth indicia is aligned with the fourth indicia that represents the month of interest whereby each of the first indicia are now properly aligned with each of the fifth indicia thereby showing the moon phase for each of the days of the month and year of interest.