Sundial with birthdays, that is, a sundial with hyperbolic lines that reproduce on the dial the arcs traveled by the sun in the sky on those given days. In such a way that the sun itself reminds us, through the shadow of the gnomon, of the birthdays of the people we love.

In these lines you can insert personalized names and dates, to remember: special occasions; birthdays; anniversaries and other commemorative dates.

The sundial with birthdays described, shows: the true solar hours of the place, drawn in dark gray and Arabic numerals, apart from the red vertical line at 12 which indicates the actual meridian line; a lemniscate (a kind of elongated figure eight) drawn to indicate 12 o’clock in the winter time zone, colored in light blue for winter, green for spring, yellow for summer and orange for autumn; the complete astronomical calendar drawn in blue, with the line of the equinoxes, the hyperbolas of the solstices, and of all the days in which the change of zodiac sign occurs; two hyperbolas drawn in red to indicate the path of the sun on the birthdays of the two owners of the house.