If I dig deeper, the Royal Observatory makes everyone feel a part of something greater than themselves, something that is called progress.
The prime meridian is arbitrary – it could be everywhere in the world.
The International Meridian conference in Washington in October 1884 decided by nations’ votes that Airy’s meridian should be the prime meridian. The main reason was the fact that in the second half of the 19th Century 72% of the world’s trade was dependant on the sea-charts which had already accepted Greenwich as the prime meridian (based on the Nautical Almanac of Nevil Maskelyne, the fifth Royal Astronomer).
The same conference approved the proposal of the Scottish-born engineer Stanford Fleming for 24 time zones, each representing 15” of longitude and an hour of solar time. The developing railway systems of America and Canada and their struggle with the local times were behind the proposal.