# Who decides what time it is?

### Who decides what time it is?

L’hour legal in France is produced and distributed by SYRTE at the Paris Observatory. The Paris Observatory’s speaking clock broadcasts thehour French law on a simple phone call (3699). Coordinated Universal Time (UTC) is the international legal time scale.

### Who gives the official time in France?

There are all kinds of websites who tell the time, with more or less accuracy. In Francethe reference official to time legal entity is the National Metrology and Testing Laboratory (LNE), who oversees French metrology.

### What number to call to find out the time?

For To do this, a solution is needed: contact the famous speaking clock! It is enough of dial the number 3669. The site also offers a service of alarm clock via number surcharged on 08 99 05 24 24. You never know.

### What is the difference between local time and standard time?

Local time implies the time of a particular country, with respect to the meridian that crosses it. On the contrary, standard time is referred to as the official local time of a region determined by the distance between the prime meridian and the meridian running through the region.

### What is the difference between local time and standard time?

Local time implies the time of a place determined on the basis of the apparent movement of the sun. Standard time refers to the time fixed for places located in the same meridian, defined in a country by law. Changes continuously with change in longitude.

### How to calculate time?

Principle of time calculation On the map of time zones, we divide the globe into 24 time zones and we graduate it from 0 of the zone towards the West, the hour decreases when we start from this zone, towards the ‘Is the hour increasing. The 180° meridian corresponds to the date line.

### How to calculate the schedules of an airplane?

To calculate the schedules of the planes, it is necessary to know either the time of arrival of a place (HA), or the time of departure (HD), the duration of the trip T and the number of time zones which separates the two points. To calculate the legal time of a place, you need to know its longitude and the GMT time.