Equation of time
Table of the equation of time (PDF document) for every day. Calculated for 12 noon CET.
Equation of time 2021
History of the sundial (PDF-Format). From the first sundial, a stick in the sand, to the modern sundial with display of standard time.
History of the sundial (German)
SENTENTIAE SOLARIS – Mottoes for sundials
Sundial construction manual
Make your own equatorial sundial: Do it yourself sundial