Time and space are domain of astrology. It means it applies to relative reality as we experience through our senses. For spiritual seeker it may be finger pointing to the Moon, not the Moon itself.
Vedic astrology uses sidereal zodiac and western astrology a tropical one. One applies precession of equinoxes in calculations; the other applies fixed time of vernal equinox as the beginning of the zodiac.
In practice it means that at this moment of time it is about 24 degrees difference in calculation of planetary and house position between two systems.
For example: If the planet is in 22 degrees of Sagittarius in the
western chart, the Indian chart will fall in about 28 degrees of Scorpio.
Additional to 12 zodiacal constellations, Jyotisha uses 27 Nakshatras, Moon mansions. They are smaller clusters of the stars. This itself is a mine of information colouring ones horoscope.
To time life events precisely Vedic astrology uses system of Dashas, planetary periods unique to each individual