Showing posts with label #Gregorian calendar. Show all posts
Showing posts with label #Gregorian calendar. Show all posts

Saturday, January 15, 2022

What is Special About the First of January?

 



            The first of January, also known as the New Year, is the largest celebrated holiday in the world. In almost every country, whether Japan, Australia or Brazil, the day is marked with festivities, firecrackers and feasts.

            Astronomically speaking, January 1st is an odd time for the New Year. It signifies neither the spring nor the fall equinox, nor does it coincide with either of the two solstices. It lies in the middle of the earth’s journey between the Zodiac constellations of Capricorn and Aquarius and doesn’t match with the end or beginning of any of the seasons.

            In original cultures, spring marked the beginning of a New Year, logically enough, since the season marked rebirth—of plants and crops, after the barrenness of winter. It’s the season when, according to natural cycles, animals and birds mate. In China, the Spring Festival coincides with the New Year. According to the ancient Babylonian, Egyptian, Indian, Iranian and Mayan calendars, the year commences with the spring Vernal Equinox, usually in March or April, when the sun starts its northern journey.

            So how did January 1 become the beginning of the New Year? The first instance occurred in Rome, in 153 BC, under the rule of Julius Caesar. It marked the Roman civil year, when Roman consuls, the highest officials of the Roman republic, started their one-year tenures. After the fall of the Roman Empire, medieval Europe banned January 1st as the New Year, considering it a pagan holiday, and replaced it with the 25th of March, which roughly corresponds to the date of Jesus’s death and resurrection.

            The use of January 1 as the New Year can be traced to the Gregorian calendar, introduced by Pope Gregory XII in 1582 as a way to correct the Julian calendar. The imprecision in the Julian calendar, which added a full day every hundred-and-twenty-eight years, created difficulties for the Church in calculating Easter, celebrated on the Sunday after the ecclesiastical full moon on or after the twenty-first of March. European scholars had been well aware of the calendar drift since the early medieval period. After much debate, in 1622, the Catholic Church adopted January 1 as the beginning of the New Year.

Many people in the world follow two and, sometimes, more calendars, pertaining to their cultures and their religious holidays. Best wishes for the New Year, whenever you celebrate it!


Mohan Ashtakala (www.mohanauthor.com) is the author of  "The Yoga Zapper," a fantasy, and "Karma Nation," a literary romance. He is published by Books We Love (www.bookswelove.com)








Thursday, October 15, 2020

The Evolution of Calendars

 


 

Calendars are intimately tied to the human observation of the Sun and the Moon.  Thus, the universality of calendars is no surprise, appearing in almost every human society, going back to pre-Bronze age cultures. The development of calendars spurred many related disciplines, such as mathematics, religion, astrology and astronomy.

The ancients’ observation of the sun, in relation to the various constellations, gave us the solar year. They noticed that the sun returned to the same position every three hundred and sixty-five (plus a fraction) days. Archeologists believe many Neolithic structures around the world, such as the Pyramid of the Sun in Mexico, Stonehenge in England and several sites in Ancient Egypt to serve this function. “Calendar circles” are remarkable for their profusion: they are found all over Africa, China, India and the Americas.

The other large, observable, heavenly body is the moon. Humans noticed that the moon also appeared at regular intervals; two weeks in a waxing phase and two weeks in a waning one. But a problem arose. The moon took twelve cycles of two-week periods to complete a year—that is, 354 days, while the sun took 365 days. Another problem is that the solar year is roughly 365.25 days long, and this one-quarter day needed accounting. Finally, both the earth’s and the moon’s orbits have been decaying imperceptibly over time, as both are slowly moving away from each other and from the sun.

These issues have dogged societies, affecting things like calculating days of worship, the time to plant crops, and to today’s problems of space flight and satellite positioning.

Early societies arrived at various solutions to these issues. The Hindu calendar, known as Panchanga, combined the lunar and solar calendar, adding an extra month called the Purushottam mas every 32-33 months, based on a complex series of calculations, to align the sun and the moon, and to account for the fractional days in a solar year. Unsurprisingly, many Eastern countries such as Cambodia, Thailand and Sri Lanka follow this luni-solar method. The only differences between these various calendars is their start date. The original Hindu calendar has a starting date of 6,676 BC, corresponding to the start of the current cycle of time known as Kali yuga. In Buddhist countries, the calendar starts at the birth of the Buddha, in 563 BC.

The Persian calendar, introduced by Omar Khayyam in the eleventh century, calculated the length of the year with astonishing precision, as 365.24219858156 days.

The Roman empire used to have a ten-month year, but when Julius Caesar came to power, introduced the Julian calendar, which introduced the leap year, without reference to the moon. While it lead to a more accurate solar calendar, it completely disassociated the moon from calendar-keeping.

The calendar currently used, called the Gregorian calendar, is a version of the Julian calendar, introduced in 1582, and has as its start date the birth of Jesus Christ.

The calendar’s original function was to determine religious observances. Indeed, the word is derived from the Latin ‘calends’ meaning ‘to call out,’ referring to the practice of announcing that a new moon had been sighted. In various cultures, the Islamic, Hindu and the Chinese, the sighting of the moon has religious significance. From the sighting of the moon, in relation to the constellations, came astrology, which posited the influence of these constellations (or spiritual beings associated with them) on human beings and societies. This record of the movement of the heavenly bodies led to the science of astronomy.

The accuracy of calendars are important, not for recording of past, but for projection of future events. The recent use of atomic clocks, which record the passage of time with astonishing precision, are an absolute necessity in today’s life, necessitated by inventions such as cell-phones, satellite communication and interplanetary travel.

This blog started as an exploration of Daylight Savings Time, but deviated into a far more interesting discussion. By the way, remember to put your clocks back by an hour this November 1st!


Mohan Ashtakala is the author of 'The Yoga Zapper," a fantasy, and "Karma Nation," a literary romance. He is published by Books We Love (www.bookswelove.com)

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