Calculate Sunset Local Time: 36N, 6E | Hour Angle, Declination Angle & More!

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To calculate the sunset local time for the coordinates 36N, 6E, the apparent solar time is given as 17:45. The hour angle was calculated as 86.25 degrees, but the declination angle could not be determined without the specific day number and month. An attempt to calculate the declination angle resulted in a value of -5.144, which is incorrect as it yielded a negative day number. The time correction factor for this calculation is noted as 1 hour. Further information on the date is necessary to accurately determine the sunset time.
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calculate the sunset local time for a location : latitude = 36 N , longitude = 6 E
if the apparent solar time at this moment was 17h,45 , and ?
i started with hour angle h = 86.25 , after that i tried to determine the declination angle d but i don't have the day number and the month , also that for equation of time i can't determine and for the solar altitude angle =0 since for sunset and sunrise so i calculated the declination angle of solar altitude relation and i get a d= -5.144 and when i tried to calculate the day number of declination angle i had a negative value and that's wrong
so what to do
 
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the time correction factor = 1 hour
 

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