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20. February 2022


Why is there even a date line?

Because otherwise you would lose or gain a day if you circumnavigated the globe. Anyone who has understood the clue in Jules Verne’s ›Around the World in Eighty Days‹ can only smile wearily at this. And anyone who is the proud owner of a Patek Philippe world time watch will cross the International Date Line near Fiji just as calmly. For others, it’s important to pay attention and not overlook the small + on the long-distance flight ticket: 12 a.m. here is 6 a.m. elsewhere. If it’s 12 a.m. here, it’s only 6 a.m. in New York and already 7 p.m. in Tokyo. That’s why we set our clocks back accordingly when traveling to the USA (i.e. 6 hours for New York) but set them forward when in Asia.

The International Date Line is located in the middle of the Pacific Ocean on the 180th degree of longitude: As a result of the first circumnavigation of the world by Ferdinand Magellan from 1519 to 1522, the International Date Line was created, which has run exactly on the 180th degree of longitude since an international agreement in 1884. If you cross it in an easterly direction, you end up in the past day (yesterday), whereas if you cross it in a westerly direction, you end up in the next day (tomorrow). Starting from Greenwich, a district of London, the globe was divided into 24 time zones, counting from the prime meridian, which begins at Greenwich Observatory. Every clock enthusiast should demonstratively cross the brass band embedded in the sidewalk once.


Each time zone is one hour. 24 time zones, of course, because the day has 24 hours and the earth rotates on its axis once in a day. Because of these different time zones, not all children born the same moment have the same birth time on their birth certificate. So if a baby saw the light of day in Basel on March 1, 2022 at 8.43 a.m., a child born at the same time in Sydney (Australia) would be recorded at 6.43 p.m. However, if a woman gave birth to her child in Los Angeles (USA) at the same time, its date of birth would be February 28, 2022 at 11.43 pm. Different birth times, different birthdays and even different birth years.

Speaking of offspring: now would of course also be the ideal time to start your own family tradition. And with the famous ‘Heure Universelle’ world clock from Patek Philippe with a dial center made of cloisonné enamel, your child will no longer have to struggle through Jules Verne’s dusty work when they reach the age of independent travel. The world map made of fine cloisonné enamel clearly shows Europe, Africa and America. This makes it easy to find your way around the globe.

Sehr geehrte Kunden,

wir wollen uns Zeit für Sie nehmen. Vereinbaren Sie einen Termin – gerne per Mail oder telefonisch.

Herzlich Ihr
Stefan Oberleitner



mit abgeschlossener Ausbildung im Uhrmacherhandwerk für unser Patek Philippe-Team