First, identify the starting and an ending time. The goal is to subtract the starting time from the ending time under the correct conditions. If the times are not already in hour time, convert Two hours = 2 hours * (1 hour/ 1 hour) = 2 hours. Same rule will be applied on 45 minutes. Forty- five min is 45 min multiplied by (1 hour and then divided by 60 minutes = 45/60 hours = Date Calculators. Duration Between Two Dates – Calculates number of days. Time and Date Duration – Calculate duration, with both date and time included; Date Calculator – Add or First date and time: Second date and time: Result: In (decimal) hours: In (decimal) minutes: In seconds ... read more

Before the 19th century, each country and even each city in the same country kept its time based on local mean time. The local mean time keeps a uniform time scale for a given longitude only. So the time varied from place to place, even in the same country.

It was hard for railway companies to make different timetables in local times for every town on the route. Worldwide navigation was another problem that demanded single world time. During International Meridian Conference, which is held in the United States in , most of the participated countries have chosen the Greenwich meridian as an initial meridian for longitude and decided " to adopt a universal day for all purposes for which it may be found convenient, which is to begin for all the world at the moment of mean midnight of the initial meridian, coinciding with the beginning of the civil day and date of that meridian; This universal day is to be a mean solar day; and is to be counted from zero up to twenty-four hours ".

The process of introducing GMT-based time in the world lasted for decades. In the 20th century, Greenwich Mean Time GMT was replaced by more accurate Coordinated Universal Time UTC , which is counted by an atomic clock and corrected manually from time to time to make it closer to the based on Earth's rotation universal time on the zero degree meridian. Modern time zone time offsets are counted from UTC, e. The table below shows the zones with non-integer offset:. Time zone boundaries are quite complex because they often reflect country or district borders.

Moreover, the time zone boundaries may change over time due to state borders changes or government decisions. Some countries advance their clocks in spring by one hour and set it back in autumn. This advanced by one hour time is called Summer time or Daylight saving time DST or simply Daylight time.

It is used for more rational use of daylight hours and to save electricity for lighting. There are different rules for switching the DST time on or off in different countries. Recently some countries decided to abandon DST due to complexity and not proven benefits. The calculator uses a timezone database, which keeps records of DST and other time changes in every region since th and from earlier times for most popular territories.

Deutsch English Español Português Русский 中文 Français. Days and time between two time points in different time zones. Date and time 1 Loading AM PM. Time zone 1. We've counted the days and know that there are days between these two dates. Our process to calculate the number of weeks can therefore look like this:.

Our date calculator allows you to look to the past. You may wish to know how many days have elapsed since you were born, since you got married or since a particular date in history the end of World War II , the birth of Shakespeare? To calculate the number of days that have passed, simply enter the year, month and day of the historical date in the first entry on the calculator. You can, of course, calculate the days or time between two dates manually, and should you wish to go down that route you'll need to remember how many days there are in each month.

We know that there's days in a regular year. If there's a leap year involved then an extra day is added. A leap year occurs every 4 years and means that February has 29 days instead of February has 28 alone or 29 in a leap year , And all the rest have So, calculating the number of days between two given dates isn't the easiest task because of the way in which our Gregorian calendar works we've been using the Gregorian calendar for over years, but many people question why we still use it.

The days between dates calculator on this page works by getting the time stamp of the start date and deducting it from the end date or vice-versa if the end date is in the past before calculating the number of hours, days and years between them. You can add weeks and months to a date by using our date calculator. To calculate the number of days since you were born , simply enter your date of birth as the start date and then ensure that the end date is set to today's date if it isn't already set, click the 'today' link that appears to the right of the box.

Then click the 'Calculate' button. Alternatively, you could give my age calculator a try. As well as telling you how many days you've been on our planet, my calculator is also able to work out what day you were born on. As an alternative, you could try the birthday calculator , which will show you all sorts of fun facts about your birthday, including the day on which you were born.

In a world where privacy of personal data is hugely important, please rest assured that I do not collect or store any of the date information you enter into this calculator. If you have any problems using our days between dates calculator, please contact us. The History of the Calculator. From abacus to iPhones, learn how calculators developed over time. Discover the number one song and movie on the day you were born.

Warning: It is necessary to enable JavaScript for full calculator functionality. Here are some instructions for how to enable JavaScript in your browser. Popup calculator Copy a link to this page Print this page Email a link to this page Scroll up to form What does this mean?

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The calculator below gives a time difference in years, months, days, hours, minutes, and seconds between two time points of two different Earth locations.

As an example, I choose a new year moment on two islands in the Pacific ocean. Even though the islands are 45 miles, the time there is 25 hours apart in the summer. To find out why this is so, read the article immediately below the calculator.

The Earth is divided into several zones where time differs. Usually, time in adjacent zones differs by one hour, with increments from west to east, except in special cases when the outer zones meet each other. A border between outer time zones is called the International date line. The time of the zones laying on both sides of the International date line differs by one day. The International date line goes just between the island from the example mentioned above, so the time in these islands differs by 24 or 25 hours one hour is added by Daylight saving time used in Samoa in summer.

Before the 19th century, each country and even each city in the same country kept its time based on local mean time. The local mean time keeps a uniform time scale for a given longitude only.

So the time varied from place to place, even in the same country. It was hard for railway companies to make different timetables in local times for every town on the route. Worldwide navigation was another problem that demanded single world time. During International Meridian Conference, which is held in the United States in , most of the participated countries have chosen the Greenwich meridian as an initial meridian for longitude and decided " to adopt a universal day for all purposes for which it may be found convenient, which is to begin for all the world at the moment of mean midnight of the initial meridian, coinciding with the beginning of the civil day and date of that meridian; This universal day is to be a mean solar day; and is to be counted from zero up to twenty-four hours ".

The process of introducing GMT-based time in the world lasted for decades. In the 20th century, Greenwich Mean Time GMT was replaced by more accurate Coordinated Universal Time UTC , which is counted by an atomic clock and corrected manually from time to time to make it closer to the based on Earth's rotation universal time on the zero degree meridian.

Modern time zone time offsets are counted from UTC, e. The table below shows the zones with non-integer offset:. Time zone boundaries are quite complex because they often reflect country or district borders. Moreover, the time zone boundaries may change over time due to state borders changes or government decisions.

Some countries advance their clocks in spring by one hour and set it back in autumn. This advanced by one hour time is called Summer time or Daylight saving time DST or simply Daylight time. It is used for more rational use of daylight hours and to save electricity for lighting. There are different rules for switching the DST time on or off in different countries. Recently some countries decided to abandon DST due to complexity and not proven benefits.

The calculator uses a timezone database, which keeps records of DST and other time changes in every region since th and from earlier times for most popular territories.

Deutsch English Español Português Русский 中文 Français. Days and time between two time points in different time zones.

Date and time 1 Loading AM PM. Time zone 1. Examples : London , Azores , Cuba , Maldives , Sydney , Japan. Date and time 2 Loading Time zone 2. Helena St. Lucia St. Outlying Islands U. The file is very large. Browser slowdown may occur during loading and creation.

Download . International date line. Time zones map excerpt. City 19th century LMT Jan, 1st, New York Detroit Monticello, Kentucky Vevay, Indiana Louisville, Kentucky Indianapolis Marengo, Indiana Winamac, Indiana Knox, Indiana Tell City, Indiana Petersburg, Indiana Vincennes, Indiana Menominee, Michigan Chicago Center, North Dakota Beulah, North Dakota Denver Phoenix Boise, Idaho Los Angeles Everyone who receives the link will be able to view this calculation. Share this page.

Date Calculators. Duration Between Two Dates – Calculates number of days. Time and Date Duration – Calculate duration, with both date and time included; Date Calculator – Add or First, identify the starting and an ending time. The goal is to subtract the starting time from the ending time under the correct conditions. If the times are not already in hour time, convert First date and time: Second date and time: Result: In (decimal) hours: In (decimal) minutes: In seconds Two hours = 2 hours * (1 hour/ 1 hour) = 2 hours. Same rule will be applied on 45 minutes. Forty- five min is 45 min multiplied by (1 hour and then divided by 60 minutes = 45/60 hours = ... read more

Time start. If you want to know how many hours, days or weeks there are between one date and another, our online calculator is here to help you. Examples : London , Azores , Cuba , Maldives , Sydney , Japan. Salary to Hourly Calc Savings Calculators Savings Goals Simple Interest Calculator SIP Calculator Time and a Half Calculator. Community Hubs Home Products Special Topics Video Hub Close. Did you mean:.

We've counted the days and know that there are days between these two dates. Date and time 2 Loading Basic