Astrology is purely based upon correct birth details and slightest mistake in birth details can make whole prediction wrong as in that case ascendant will change which in turn change house lord as well.
So particular house which is showing promise in birth chart before time change may altogether become negative after time modification. So it is very necessary that correct birth details should be supplied well in advance.
But think of the scenario in which one have correct birth date and place of birth but does not have correct time of birth so in that case should we think that one does not get the astrology report. No it is not the case; astrology is in itself so powerful that there are other solutions to underlying problem.
One such solution to this problem is mapping native events to planetary transits. In this method generally 5 events will be required for Astrology time rectification and that 5 events will map out for planetary transits to get Astrology time rectification.
It will be quite tedious process on part of astrologer as 5 events had to be mapped for that time period. Answer will be very short but tedious mathematical calculation that will be involved in solving astrology time rectification would be quite hugh.
So in astrology time rectification report we will require and cover:-
5 events for the person for whom astrology time rectification had to be made like
When one had completed schooling
When one had purchased car or house
When one got married
When one got job
When your first child was born
and so on and so forth
In astrology time rectification report this events will be mapped out and astrology time rectification would be given.