Once a lunar calendar was set and running smoothly it would be very useful for predicting the phase of the moon at future equinoxes and solstices. At that time all Dot-Count calendars world wide would have the year's first marker set on the zero dot. The occasion of a closer near simultaneous full moon winter solstice won't occur until the end of 2314 when a full moon will precede the solstice by about an hour. A triple knot can mark the winter solstice and a double knot at the first dot will assure proper orientation. An additional length of string tied to the winter solstice point can be knotted to indicate the starting dot for a given year should the count be lost during forward or backward runs.
Every nineteenth knot is tied off with short lengths of string or similar marking devices.
The whole calendar fits comfortably into a pocket and prehistoric people could have carried it wherever they traveled. For 2000 start your 235-19 lunar calendar by marking the solstice knot and every nineteenth thereafter. Once set it will remain accurate to one moon for 6500 years. Or you could leave a note for your offspring to make the correction in 2332. Such a calendar made with tenth-inch beads would make an attractive and practical necklace .