How to calculate horoscope from date

This article mainly introduces the calculation of zodiac signs through dates, which has a certain reference value. Now I share it with everyone. Friends in need can refer to it

##321Aries420 3/22 - 4/20421Taurus5204/22 - 5/20521Gemini 6215/22 - 6/21622Cancer7226/22 - 7/22723Leo8227/22 - 8/22823Virgo9228/22 - 9/22923Libra10229/22 - 10/22 1023SCORPIO112110/22 - 11/211122Sagittarius122111/22 - 12/211222Capricorn11912/22 - 1/ 19##

12 months in a year
Abstract an array

c = [摩羯，水瓶， 双鱼，白羊，金牛，双子，巨蟹，狮子，处女，天秤，天蝎，射手，摩羯]

c is a list of months
The starting month corresponding to the Aquarius with the serial number 1 in the array isJanuary
The serial number is Starting month or (Ending month - 1)
The constellation corresponding to the dateThe starting month is the date The month or the ending month is the month (that is, the starting month is the month -1 of the date)
In order to get the constellation corresponding to the date, we calculate the start of the corresponding constellation through the date Month

startMonth = month - [(day < Date[month]) ? 1 : 0]
c = [摩羯，水瓶， 双鱼，白羊，金牛，双子，巨蟹，狮子，处女，天秤，天蝎，射手，摩羯]
index = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
Date = [22, 20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22]

startMonth - the calculated starting month of the corresponding constellation;
Month - the month corresponding to the date;
day - the number corresponding to the date;
Date - the date corresponding to the month list List;

Explanation:
Corresponding constellation starting month = current month - [(whether the current date is less than the date of the corresponding month), if yes, it is 1, otherwise it is 0]
Judge (date corresponding number Number a54aa723b94edbab5bbca5c06cea1a05 '865778999988'

startMonth = month - [(day < Date[month]) ? 1 : 0]
=> month - (day - 14 < &#39;865778999988&#39;.charAt(month))  
true 自动变为 1；  
true 自动变为 0；  
charAt为寻找字符串对应位置的str

最终代码

var date = new Date(2017,1,12);
//设置日期
function getHoroscope(date) {
  var c = ['摩羯','水瓶','双鱼','白羊','金牛','双子','巨蟹','狮子','处女','天秤','天蝎','射手','摩羯']
  var month = date.getMonth() + 1;
  var day = date.getDate();
  var startMonth = month - (day - 14 < &#39;865778999988&#39;.charAt(month));
  return c[startMonth]
}
getHoroscope(date);
//水瓶

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Start Month		#Constellation	Ending month		#Time interval
12	22	Capricorn	1	19	12/22 - 1/19
1	20	Aquarius	2	18	1/ 20 - 2/18
2	19	Pisces	3	20	2/19 - 3/20

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