Astrology is a colour wheel, not a clock
Astrology is not like a clock it's more like a colour wheel where the colours slowly blend into each other. If you're born too early or late into one zodiac sign you're definitely the influence of the sign you're so close to. This is where the term sidereal comes in.
As in, folks think the zodiac signs switch from one sign to the next like the day the season of that sign starts. Like a clock. Or a colour wheel with separate colours like this
Nah it's more like a colour wheel with the colours blended into each other. You feel the energy of the uncoming placements before the time arrives. You recognise this the most with full moon energy cos it lasts more than the day of that full moon.
It's really the people born smack bang into the middle season of zodiac sign (like 15 degrees into it) that are the most like the zodiac sign in question they're born into. If that makes sense