Calculation of Time

The International Date Line has been considered as the “line of demarcation” and separates consecutive two calendar dates.  If a traveller crosses the IDL and moves towards west, then it is considered a day gain. Whereas when it is crossed back again then it’s the day lost. Countries have no legal bound to follow particular date lines rather they follow the datelines of convenience. As the timeline runs from north to south, it zigzags the political border of Alaska’s Aleutian and Eastern Russia.

The time duration calculator 

Time Duration Calculator is specified in calculating duration between two times. Either the time formats which are 12-hour or 24-hour formats are being supported. Two elapsed times or two clock times are accepted during calculating duration. A clock calculator is generally used to find out the duration between two times of a single day or night. The elapsed time calculator is the calculator where time duration will be shown after entering start time and end time. Default settings are made where time is entered in the format of hours, minutes and seconds. Units of time entry can be changed as per convenience. It is also noted that time duration can be calculated if the end time elapsed is more than the start elapsed time. No strict format is being followed for time entry, it can be either 12 hour or24 hour format.

The clock time duration calculator is used in the following ways:

• Clock formats are being selected first
• Start time of the clock is being selected, mentioning hour, minute and second. While using the 12-hour format of a clock, am or pm has to be mentioned 
• End clock time is then entered. Same format as that of start time being followed here. It is noted that clocks can find time duration only if the time starts on one day and ends on another day 
• The result will be shown in the format of a number of hours, then a number of minutes and lastly the seconds

The duration between two places

Duration between two places is generally calculated based on longitude. The International Date Line Plays an Important role as the country determines which dates to be followed. The eastern or western portion of the place on earth’s surface is being determined by the longitude of a place. Longitudes are commonly measured in degrees. As a circle is of 360 degrees there are 360 meridians of longitudes. Degrees have been further divided into minutes and these minutes are divided into seconds. 24 hours is the duration for covering 360 meridians of longitudes. Therefore it can be concluded that in every hour 15 degrees of longitude is covered. Henceforth 4 minutes are needed to cover one degree. The direction of rotation of earth is from west to east. Hence the places in the east are ahead of the places in the west.  

For example, the time in Mumbai is 08:00 am, the time in Wellington has to be calculated. The longitude of Mumbai is 73˚ east and the longitude of Wellington is 175˚ east. The difference between the two longitudes is 102 degrees. This is done as both the places are in eastern hemisphere. As it is previously discussed that one degree = 4 minutes, therefore 102˚ = 102 * 4 = 408 minutes. 408 minutes can also be defined as 6 hours and 48 minutes. Wellington is at the east of Mumbai and places at east are ahead than places of the west, therefore, time in Wellington is 6 hours 48 min ahead of Mumbai. Hence the time is 2:48 pm 

Application of formulae of time

Application of formula of time is done in several cases. An important application of the numerical on the specific concept or time is to determine the correct time of different places. Different places are under different longitudes. And hence the times of all places are different. In order to avoid confusion a specific time has been set for the whole country to follow. The time is set based on the Zero longitude of Greenwich. Based on this, every country has its different time zones.  Based on these time zones it is easier to set time while travelling to other places. Flight operations and systems are based on these time zones. As they have to pass through several zones during their path. Sailors have acquired the same level of advantage through these procedures.  Specific methods are being followed to solve such time-related problems as has been previously mentioned. 

Conclusion

The International Date Line is of utmost importance and that has been a great discovery for common people. The international date line has some importance in the field of time zones. The line of the date that is present helps in diving the world into time zones that are about 24 in number. When the line of the data has been crossed there are notified falls in the parts of the longitude. It has been providing standard readjustment that is needed while crossing different zones for different countries. IDL has been useful in creating coordination between the day and time. Tracking of correct time is needed for coordinating several other works.