San Francisco Sundials
Ingleside Terraces sundial, aerial view San Francisco sundial, aerial view
The Ingleside Terraces Sundial on Entrada Court was built at the at the time of the original development of Ingleside Terraces. The gnomon is 28'4" long. As evidenced by the plaque at its base, it was dedicated on October 10, 1913, the same day as the "meeting of the waters" in the Panama Canal. This sundial is located in Hilltop Park in the Bayview District of San Francisco. The steel gnomon is 78 feet long. More information about San Francisco sundials is found at sundials.org

How to tell time with the Ingleside Terraces sundial:
Ingleside Terraces sundial suntime
10:32 suntime, 11:35 PDT Sep 20

12:00 suntime, 13:11 PDT Jun 20
summer solstice

Doesn't work if it's foggy

15:28 suntime, 16:31 PDT Sep 19
Use the shadow to the left in the morning, to the right in the afternoon, and the center at noon.
Right click the images to view larger images and the 15' and 30' time markings in the concrete.
Solar Noon, 12:00 on a sundial, occurs in San Francisco at the following local times (for the 21st of each month, 2015):
January 12:22 PSTApril 13:09 PDTJuly 13:16 PDTOctober 12:54 PDT
February 12:24 PSTMay 13:07 PDTAugust 13:13 PDTNovember 11:56 PST
March 13:18 PDTJune 13:12 PDTSeptember 13:03 PDTDecember 12:08 PST
The Ingleside Terraces sundial time and clock time are the same (within a minute) from December 2 to 5.
Ingleside Terraces sundial 10/18
photo October, 2018
Sundials point north and the angle of the gnomon is equal to the latitude (37.725 degrees for the Ingleside Terraces Sundial), so that the gnomon is parallel to the earth's axis. The gnomon always points to Polaris, the North Star. If you stand next to the Ingleside Terraces Sundial at night and look up the gnomon, you will see Polaris.
[+] How to convert from sundial time to clock time:
[+] Sundial Bridge, Redding, CA:

Ingleside Terraces sundial, enhanced aerial view
Ingleside Terraces Sundial Centennial 2013
Ingleside Terraces sundial, winter solstice
Ingleside Terraces Sundial winter solstice 2013
Longest shadow of the year at noon.
Ingleside Terraces Sundial links:
Google map, directions to the Sundial
Ingleside Terraces Sundial, Then and Now Photos
Ingleside Terraces Giant Sundial
Kite Aerial Photographs
Sundial History

Creative Commons License
Robert Karis
www.sfog.us