Want to know how many hours of sunlight there are in a particular location on a specific day? When the moon will be full? Exactly when Winter Solstice or Summer Solstice occurs? Other cool stuff like that?
Sun and Moon data
Rise, set, transit, twilight data; phases of the moon; eclipses and transits; positions of celestial objects; synthetic views of the earth and solar system bodies; dates; celestial navigation; misc.
Includes Data Services (above)
Astronomical Information Center
Solstices, Equinoxes, FAQs, etc.
Equinox, Solstice, and Cross-Quarter moments for different years
I lived in the Pacific Northwest for a little while and think Cliff Mass rocks.