This is from Mother Goose & Grimm.
Now I know it is a comic strip and all, but it is ANNOYING. [I actually like this comic strip, but am annoyed with this particular one.]
Stonehenge is NOT some giant sundial! It was never used to tell time!! Besides the fact, that Daylight Savings Time is a modern construct! Heck, time zones are a construct! Historians aren't sure what it was used for...they have a lot of theories of which NONE of them are about telling time!
And what really galls me, is this is the stuff the average person will remember not the lecture I give in History 101!
Anyway, to rectify the problem a little here are some sites to check out:
Encyclopedia Britannia on Stonehenge