Depending on how much you want to get into sundials, consider the following (and then use a search engine if you are so inclined.):
Solar (or apparent) time indicated by sundials and clock (or mean) time are different and must be correlated by the use of tables showing daily variations in sun time. A correction must also be made for the difference in longitude between the position of a sundial and the standard time meridian of a given locality.
10 months ago
Last edited at 10:58AM on 5/19/2013
Get a compass . If you want it to be accurate . Side note:Each day the rising and setting points change slightly. At the summer solstice, the Sun rises as far to the northeast as it ever does, and sets as far to the northwest. Every day after that, the Sun rises a tiny bit further south.