The date in dog days calculates the method

The date in dog days calculates the method
Dog days of 2009 begins formally from July 14, how get specifically to calculate the date in dog days, a lot of people are not clear, this text makes simple explanation.The cold is in three nine-day periods after the winter solstice, it has been hot in dog days, the nine periods since the Winter Solstice day, one nine for nine days, very easy to calculate on the Gregorian calendar, and in which day it will be three ten-day period of hot season, calculate, stand up with the Gregorian calendar very difficult. Because of lunar calendar according to China, since the Summer Solstice day, third age of one that is according to lunar calendar begin in the three ten-day period of hot season on day, stipulate the first age is the beginning in dog days on day after autumn at the same time and set up. In this case, it is ten days sometimes in the second of the three ten-day periods of the hot season, 20 days. Summarize and does not get on very well, it is in the middle of the Summer Solstice day and the beginning of autumn day, separated by about 45 days, if there is four ages day during this time, it is ten days in the second of the three ten-day periods of the hot season, if there is five ages day, it is 20 days in the second of the three ten-day periods of the hot season,
Has said so much, from which day problem which begins the three ten-day period of hot season is not easy to solve on earth, because does not generally indicate the Heavenly Stems to remember the law on day in the calendar, does not know which day is age day, thus not just easy to infer the third age since the Summer Solstice day is some day on day. Put forward a simple and convenient method for everybody here, because of one ten days age day, and first annual ' Tropical year) It is 365 days, though not age day integer time of the cycle, differ by for half a age day, in this case, it is very apt to calculate which day is age day. For example belong to dog days are day such as ages, must day such as age in 2006 July 10 2005 July 15, and day such as age in 2007 July 15, and so on and so forth, very apt to calculate day such as age? Should pay attention to a question here, it is the Gregorian calendar that has leap year, it is 366 days every leap year, it will be just leap year in 2008, this is easy to handle too, calculated one day more every leap year, for example not calculate in 2008, should be age day on July 10 according to leap year, but divide and gain one day this February of year, after counting this day in, became age day on July 9, can calculate according to the method ahead in 2009, day such as age in July 14, until the fact that 2012 year transfer one day forward.
Generally speaking, in June 22, but cycle for a tropical year probably 365 days plus about 6 hours will it be day the Summer Solstice, in this case, have, fluctuate around June 22 will it be day the Summer Solstice, generally will fluctuate between June 21 and June 23, no matter how fluctuate will it be day the Summer Solstice, date of three ten-day period of hot season can only ahead of time lagging behind five day (meet leap year ahead of time 6 day or lag behind 4 day) next year ,So the date in three ten-day period of hot season calculates that a bit more complicated, it is still relatively stable to arrive. The table below provides belonging to dog days date of the most recent 10 years.
Times The Summer Solstice is day The three ten-day period of hot season begins on day The second of the three ten-day periods of the hot season days The beginning of autumn is day First day of the last period of the hot season begins on day
August 14 of the 7th of August of 20 days of the 15th of July of the 21st of June, 2005
August 9 of the 8th of August of 10 days of the 20th of July of the 21st of June, 2006
August 14 of the 8th of August of 20 days of the 15th of July of the 22nd of June, 2007
August 8 of the 7th of August of 10 days of the 19th of July of the 21st of June, 2008
August 13 of the 7th of August of 20 days of the 14th of July of the 21st of June of 2009
August 8 of the 8th of August of 10 days of the 19th of July of the 21st of June, 2010
August 13 of the 8th of August of 20 days of the 14th of July of June 22nd, 2011
August 7 of the 7th of August of 10 days of the 18th of July of June 21st, 2012
August 12 of the 7th of August of 20 days of the 13th of July of June 21st, 2013
August 7 of the 7th of August of 10 days of the 18th of July of June 21st, 2014The editor recommends:Defend 13 methods of heatstroke
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