Convert the given Gregorian date/time to Julian Days.

Date : August 15, 2006
Time : 7 : 34 P.M. Central Standard Time

In[1]:=

"julian_1.gif"

Out[1]=

"julian_2.gif"

Out[2]=

"julian_3.gif"

Out[3]=

"julian_4.gif"

Calculate the coefficients a, m and y.

In[4]:=

"julian_5.gif"

Out[4]=

"julian_6.gif"

Out[5]=

"julian_7.gif"

Out[6]=

"julian_8.gif"

Put them into the formula for Gregorian Dates

In[7]:=

"julian_9.gif"

Out[7]=

"julian_10.gif"

The Julian Day is 2453950. To this, we need to add the time. In order to do this, we need to convert CST to UTC first. 7:34 PM CST is 19:34 CST, which is 25:34 UTC (add 6 hours for UTC). This is more than 24 hours, so we can call this a day plus 1:34 hours. Converting 1 hour and 34 minutes into days, we get:

In[8]:=

"julian_11.gif"

Out[8]=

"julian_12.gif"

Therefore the Julian Day is 2453951.0652778


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