August 15

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August 15 is the 227th day of the year(228th in leap years) in the Gregorian calendar. 138 days remain until the end of the year.

A leap year is a calendar year containing one additional day added to keep the calendar year synchronized with the astronomical or seasonal year. Because seasons and astronomical events do not repeat in a whole number of days, calendars that have the same number of days in each year drift over time with respect to the event that the year is supposed to track. By inserting an additional day or month into the year, the drift can be corrected. A year that is not a leap year is called a common year.

The Gregorian calendar is the calendar used in most of the world. It is named after Pope Gregory XIII, who introduced it in October 1582. The calendar spaces leap years to make the average year 365.2425 days long, approximating the 365.2422-day tropical year that is determined by the Earth's revolution around the Sun. The rule for leap years is:

Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100, but these centurial years are leap years if they are exactly divisible by 400. For example, the years 1700, 1800, and 1900 are not leap years, but the year 2000 is.

Contents

Events

Year 636 (DCXXXVI) was a leap year starting on Monday of the Julian calendar. The denomination 636 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Arab–Byzantine wars Series of wars between the 7th and 11th centuries

The Arab–Byzantine wars were a series of wars between the mostly Arab Muslims and the Byzantine Empire between the 7th and 11th centuries AD, started during the initial Muslim conquests under the expansionist Rashidun and Umayyad caliphs in the 7th century and continued by their successors until the mid-11th century.

Battle of Yarmouk battle of the Arab–Byzantine wars

The Battle of Yarmouk was a major battle between the army of the Byzantine Empire and the Muslim forces of the Rashidun Caliphate. The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River, along what today are the borders of Syria–Jordan and Syria–Israel, east of the Sea of Galilee. The result of the battle was a complete Muslim victory which ended Byzantine rule in Syria. The Battle of Yarmouk is regarded as one of the most decisive battles in military history, and it marked the first great wave of early Muslim conquests after the death of Muhammad, heralding the rapid advance of Islam into the then Christian Levant.

Births

1013 Year

Year in topic Year 1013 (MXIII) was a common year starting on Thursday of the Julian calendar.

Princess Teishi, also known as Yōmeimon-in (陽明門院), was an empress consort of Emperor Go-Suzaku of Japan. She was the second cousin of her husband.

Year 1171 (MCLXXI) was a common year starting on Friday of the Julian calendar.

Deaths

398 Year

Year 398 (CCCXCVIII) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Eutychianus. The denomination 398 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Lan Han was an official of the Xianbei state Later Yan, who killed the emperor Murong Bao in 398 and briefly took over the regime before being killed by Murong Bao's son Murong Sheng.

Xianbei ancient people in Manchuria and Mongolia

The Xianbei were an ancient nomadic people that once resided in the eastern Eurasian steppes in what is today Mongolia, Inner Mongolia, and Northeastern China. They originated from the Donghu people who splintered into the Wuhuan and Xianbei when they were defeated by the Xiongnu at the end of the 3rd century BC. The Xianbei were largely subordinate to larger nomadic powers and the Han dynasty until they gained prominence in 87 AD by killing the Xiongnu chanyu Youliu. However unlike the Xiongnu, the Xianbei political structure lacked the organization to pose a concerted challenge to the Chinese for most of their time as a nomadic people. After suffering several defeats by the end of the Three Kingdoms period, the Xianbei migrated south and settled in close proximity to Chinese society and submitted as vassals, being granted the titles of Dukes. As the Xianbei Murong, Tuoba and Duan tribes were one of the Five Barbarians who were vassals of the Han Chinese Western Jin and Eastern Jin dynasties, they took part in the Uprising of the Five Barbarians as allies of the Han Chinese Eastern Jin against the other four barbarians, the Xiongnu, Jie, Di and Qiang. The Xianbei were at one point all defeated and conquered by the Di Former Qin empire before it fell apart at the Battle of Fei River at the hands of the Eastern Jin. The Xianbei later founded their own states and reunited northern China as the Northern Wei. These states opposed and promoted sinicization at one point or another but trended towards the latter and had merged with the general Chinese population by the Tang dynasty.

Holidays and observances

Armed Forces Day (Poland) national holiday of Poland, commemorates, the 1920 Polish victory at the Battle of Warsaw

Armed Forces Day, known also as the Feast of the Polish Armed Forces, is a national holiday celebrated annually on 15 August in Poland, commemorating the anniversary of the 1920 victory over Soviet Russia at the Battle of Warsaw during the Polish–Soviet War. Armed Forces Day is held in conjunction with the Day of the Assumption of the Virgin Mary, itself a separate public holiday. The event is marked by military parades, equipment reviews, showcases and remembrances by all branches of the Polish Armed Forces across the country. One of the most prominent events of the day is in the capital Warsaw, which hosts a large military parade through the city's center. Originally celebrated during the Second Republic, the holiday was barred by authorities during the communist era beginning in 1947, only to be revived again in 1992.

Calendar of saints Christian liturgical calendar celebrating saints

The calendar of saints is a traditional Christian method of organizing a liturgical year by associating each day with one or more saints and referring to the day as the feast day or feast of said saint. The word "feast" in this context does not mean "a large meal, typically a celebratory one", but instead "an annual religious celebration, a day dedicated to a particular saint".

Altfrid Benedictine bishop of Hildesheim

Saint Altfrid was a leading figure in Germany in the ninth century. A Benedictine monk, he became Bishop of Hildesheim, and founded Essen Abbey. He was also a close royal adviser to the East Frankish King Louis the German.

Related Research Articles

August 1 is the 213th day of the year in the Gregorian calendar. 152 days remain until the end of the year.

April 9 is the 99th day of the year in the Gregorian calendar. 266 days remain until the end of the year.

July 10 is the 191st day of the year in the Gregorian calendar. 174 days remain until the end of the year.

June 18 is the 169th day of the year in the Gregorian calendar. 196 days remain until the end of the year.

June 21 is the 172nd day of the year in the Gregorian calendar. 193 days remain until the end of the year.

January 11 is the 11th day of the year in the Gregorian calendar. 354 days remain until the end of the year.

July 27 is the 208th day of the year in the Gregorian calendar. 157 days remain until the end of the year.

November 11 is the 315th day of the year in the Gregorian calendar. 50 days remain until the end of the year.

November 8 is the 312th day of the year in the Gregorian calendar. 53 days remain until the end of the year.

October 26 is the 299th day of the year in the Gregorian calendar. 66 days remain until the end of the year.

October 18 is the 291st day of the year in the Gregorian calendar. 74 days remain until the end of the year.

October 23 is the 296th day of the year in the Gregorian calendar. 69 days remain until the end of the year.

September 22 is the 265th day of the year in the Gregorian calendar. 100 days remain until the end of the year. It is frequently the day of the autumnal equinox in the Northern Hemisphere and the day of the vernal equinox in the Southern Hemisphere.

September 14 is the 257th day of the year in the Gregorian calendar. 108 days remain until the end of the year.

September 12 is the 255th day of the year in the Gregorian calendar. 110 days remain until the end of the year.

September 13 is the 256th day of the year in the Gregorian calendar. 109 days remain until the end of the year.

September 15 is the 258th day of the year in the Gregorian calendar. 107 days remain until the end of the year.

September 19 is the 262nd day of the year in the Gregorian calendar. 103 days remain until the end of the year.

September 25 is the 268th day of the year in the Gregorian calendar. 97 days remain until the end of the year.

August 20 is the 232nd day of the year in the Gregorian calendar. 133 days remain until the end of the year.

References

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