Why are some holidays celebrated one day later in Jerusalem?

Some holidays are celebrated one day later in Jerusalem primarily due to the city's unique observance of the Jewish calendar and its historical significance. In Jewish tradition, holidays begin at sunset and are based on lunar cycles, which can lead to variations in observance. Additionally, Jerusalem's status as a religious center has led to specific practices that may differ from those in other locations. As a result, some communities might choose to celebrate certain holidays on different days to align with local customs or rabbinical rulings.