Time Zone Converter

Time zones are regions of the Earth seen to display a uniform and standard local time generally for social, legal and commercial purposes. These time zones are seen as an effective measure to allow commercial areas in close proximity of each other to be defined by the same local time thus allowing an easier method of communication.
This has resulted in specific time zones to follow the patterns of the boundaries of some states within several countries for political and commercial reasons. Most of the time zones within specific countries have been derived as an onset from the Coordinated Universal Time otherwise known as UTC by hourly values including whole numbers.
However some of these time zones have been observed as offset of between 30 to 45 minutes such as seen in Nepal Standard Time.
Countries located within higher latitudes on the Earth have been known to use Daylight Saving Time transitions during one part of the year by advancing and moving the clocks backwards by an hour respectively to maximize the daylight time used.

Several land based time zones towards the west have been observed to suddenly change their positions in reference to the similar time zones used by sailors. As a result this occurrence creates a permanent daylight savings effect to the affected region. Prior to the invention of clocks people were able to calculate the time of day by using the positioning of the Sun otherwise known as solar time.
This was observed by the Sun’s exact position on a daily basis via a sundial. With the introduction of mechanical clocks in the early part of the 19th century each city began to use its own local mean solar time. As a result of the specific shape of the Earth’s orbit around the Sun, and it’s unique tilt on its axis, the difference between mean and apparent solar time can vary up to as much as 15 minutes.
The days contained within mean solar time are equal in their length while the difference between both mean and apparent solar time after a year equates to zero. In 1675 at the Royal Observatory in England Greenwich Mean Time was introduced to assist mariners to calculate their longitude while at sea by effectively providing them with a standard reference point though each city within England was seen to observe a different time.
The Italian mathematician Quirico Filopanti was the first person to suggest the use of a worldwide system to govern time zones in his book labeled Miranda and published in 1858. This proposal however was acknowledged or adopted into the use of time zones during the 19th century.
Filopanti suggested using 24 hourly time zones which he referred to as “longitudinal days” with the first zone centered on Rome’s meridian. By the turn of the 19th century the majority of the local time used worldwide was calculated using standard time zones. Several of these zones were seen using an offset of one hour effective from the Greenwich Mean Time.
It took several decades for all local time used in the various countries worldwide to recognize their times zones in reference to a standard offset of the Greenwich Mean Time. However it was not until 1929 that the major countries were seen as using hourly time zones. Today nations worldwide all use standardized time zones for their respective purposes, however they do not all conform to the original concept conceived.