#history In ancient times, the way in which time was handled was by data related to religion, seasons and a little astrology, since this method was not at all accurate, mathematical and astronomy knowledge was included, resulting in the first lunar calendars, where the sky was the reference for measurement of time, using the position of the planets and the phases of the moon, or which determined the passage from one month to another was the orbit of the moon, when it returned to its initial phase the month was terminated, once the 12 lunar months passed, it was understood that a year had elapsed. Then, there was a need to include the passage of seasons, so lunisolar calendars were created, where months were grouped according to climatic periods.

the first calendar in history, since it was created more than 5 thousand years ago by the Sumerians, these were the inhabitants of the village of Mesopotamia, which was characterized by being a very advanced people, they were pioneers in dividing the day into several parts, specifically into twelve danna of thirty ges each, in other words, they divided the day into 12 hours and each of these hours were divided into 30 parts, the Babylonians also made their contribution, they were the ones who devised fragmenting the day into 24 hours and in turn every hour, in 60 minutes, they made this application based on the fact that the number 60 represents one sixth of a circle, a result they obtained by multiplying the number 5 by The 12 months of the year, The number 5 represents the number of planets known for that time, which were, Jupiter, Saturn, Mars, Venus and Mercury