The longitudes of all planets vary according to the latitude and longitude of the place. So all the connected day, nakshatra, thithi, karana, Yoga etc. will also change. Sometimes you will find Nakshatra the same, but the time it has advanced in the Nakshatra will vary. So for all astrological purposes the longitude and latitude of the place has to be reckoned for correct evaluation of the horoscope. The almanac or panchanga are printed for different places in the country depending on the sunrise, sunset, moonrise and moonset times.