Couple Date Poster, Personalized Anniversary Math Curve Art

Two dates side by side on a landscape print: a couple, or a parent and child. Each date draws its own curve, and the poster shows the equations that drew them.

Give each date a spirograph, Lissajous or standing-wave curve, mixed or all the same, then choose a color scheme and the names to print. You can leave the dates themselves off the poster.

Each poster is designed on our website, locus-and-line.com, with a live preview you check before it goes to print. Ordering in the Shop app or through an assistant instead? We'll email you for the names and dates before printing.

Printed on enhanced matte paper and shipped unframed within the US.

How a date becomes a curve

The Lissajous curve

The month sets the side-to-side waves, the day the up-and-down waves, and the year where the curve starts.
The spirograph

A small wheel rolls inside a ring with a pen near its edge: the day sets the ring, the month the wheel, the year how far out the pen sits.
The standing wave

A string fixed at both ends: the month sets the loops, the day the moments drawn and a second note, the year how much of that note joins in.
What note does your date play?

On a string tuned to A, every date plays a note. Tap to hear it, then try yours.