How can we tell time by the sun
it's like a big clock. if your shadow it is near the east, it is the morning...if it is in the middle of the sky, it is noon...if it is near the west, it is the evening. you'd have to estimate what time it is.Read more: http://wiki.answers.com/Q/How_can_you_tell_the_time_from_the_sun#ixzz1vTICa8ub
watch your shadow if the shadow is on the left side of you it is still morning if it's right below u it's noon if it's on the right side of u it's the afternoon :)
People would need a sundial to do this. They can tell how the sun hits a certain area that can tell what time it is.
try this out http://www.showmenow.com/?q=node/116 it may strain your eyes to read sorry