Print Your Solar Noon Calendar
for your exact longitude wherever you are in the world

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This facility was devised for purchasers of Spot-On Sundials, an innovative modern design of unparalled accuracy. Please visit our websites at and or click on the images for more details!

Original Spot-On Sundial in brass

New! Polar Spot-On Sundial in brass

Spot-On Sundial in stainless steel

The innovation is the split gnomon which produces a "line of light" at solar noon. To set up a Spot-On Sundial to true north, all you need is the exact time of solar noon at your longitude - you can then rotate the dial till you get the line of light, lock it down, and it is then "spot on" to true North.               Design copyright © Piers Nicholson 2001

The time of solar noon depends on the Equation of Time and on the difference in longitude between your location and the standard meridian of the time zone you are in. It is slightly different for every day of the year. Our unique Solar Noon Calculator will provide you with a table showing the exact time of solar noon for your location for each day of the year.

If you prefer, you can print out the values of the Standard Time Correction, which gives you the amount to add to, or subtract from, the time on your sundial to obtain the time shown by your watch. The Standard Time correction is the sum of the Equation of Time, and the longitude correction; the longitude correction is the time the sun takes to travel between your longitude and the longitude of your standard meridian

Our latitude and longitude page from our sister site, Spot-On Sundials, will help you to find the input data you need for our unique Solar Noon Calculator

Note that our calculator requires that your latitude and longitude be in decimal format. If your co-ordinates are in Degrees, Minutes, Seconds please click here.

  Example Your Details Comments
Location Epsom this information is dislayed across the top of your calendar, it is not included in any calculations
Latitude 51.33250 N optional - enter your latitude if you want your latitude/longitude co-ordinates to be displayed on your calendar
Longitude 0.26722 W required - Longitude is used in the calculations
Time Zone required - select your time zone from the drop-down list
Type of Calendar Solar Noon       Standard Time Correction Solar Noon displays the exact time of solar noon each day.
Standard Time Correction is the amount you have to add to, or to subtract from, solar time on your sundial to get the time shown on your watch (see note above)

If your area has daylight saving time in the summer, we recommend that you highlight or draw a box round the relevant time, and write "Add one hour for daylight saving time" at the foot of the relevant months.

We recommend you to try out SNAP - thesundial app at This app shows you the current clock time and solar time for a city near you - give it a try!

This site developed and maintained by of Epsom, England
You may also be interested in our page of links to other sundial and astronomical website.
.... and to some of the other websites we have developed
Webpage copyright © internetworks Ltd, 2001/2014        last updated Occtober 2014
In case of problems, please contact the webmaster