The sundial is an instrument for measuring time by using the shadow of the sun. Sundials were quite common in ancient times before clocks and watches were invented.
"Thirty days hath September, April, June, and November," etc., and many other rhymes and devices are used to aid the memory to decide how many days are in each month…
History of Calendar and What is the Gregorian Calendar?When people first began to sow wheat and reap the harvest, they had observed that sowing falls each year at the same…
The day lasts 24 hours just because the humans wanted to share it in such manner. There is nothing in nature that is related to the hours, minutes and seconds. This…