Use the calculators below to find the number of hours and minutes between two times. For a full time card, please use the Time Card Calculator.
Time difference calculator and free online date & time calculator that lets you calculate the time duration of any date/time period. Calculate how many years, months, weeks, days, hours, minutes or seconds there are between any two dates, e.g. Between today and a date in the future, or in the past. Time difference calculator and free online date & time calculator that lets you calculate the time duration of any date/time period. Calculate how many years, months, weeks, days, hours, minutes or seconds there are between any two dates, e.g. Between today and a date in the future, or in the past.
Hours Between Two Dates
An hour is most commonly defined as a period of time equal to 60 minutes, where a minute is equal to 60 seconds, and a second has a rigorous scientific definition. There are also 24 hours in a day. Most people read time using either a 12-hour clock or a 24-hour clock.
12-hour clock: Pf1209 pen tablet.
A 12-hour clock uses the numbers 1-12. Depending on the clock being used, most analog clocks or watches may not include an indication of whether the time is in the morning or evening. On digital clocks and watches, 'AM' stands for anti meridiem, meaning 'before midday,' while 'PM' stands for post meridiem, or 'after noon.' By convention, 12 AM denotes midnight, while 12 PM denotes noon. Using the terms '12 midnight' and '12 noon' can remove ambiguity in cases where a person may not be accustomed to conventions. Pokemon fire red link download.
24-hour clock:
A 24-hour clock typically uses the numbers 0-23, where 00:00 indicates midnight, and a day runs from midnight to midnight over the course of 24 hours. This time format is an international standard, and is often used to avoid the ambiguity resulting from the use of a 12-hour clock. The hours from 0-11 denote what would be the AM hours on a 12-hour clock, while hours 12-23 denote the PM hours of a 12-hour clock. In certain countries, 24-hour time is referred to as military time, since this is the time format used by militaries (and other entities) around the world, where unambiguous time measurement is particularly important.
Hours in different time periods
| Description | Hours |
| Hours in a day | 24 |
| Hours in a week | 168 |
| Hours in a month | 672 for a 28-day month 696 for a 29-day month 720 for a 30-day month 744 for a 31-day month 730.5 on average |
| Hours in a year | 8,760 for a 365-day year 8,784 for a 366-day year 8,766 on average |
| Hours in a decade | 87,648 for a 2-leap-year decade 87,672 for a 3-leap-year decade 87,660 on average |
| Hours in a century | 876,600 |
On this page is a date to UNIX time converter, or UNIX time calculator. Enter a date and time and we'll return a UNIX timestamp in seconds since January 1, 1970 (ignoring leap seconds).
For the other direction, try the UNIX time to date converter.
Date to UNIX Time Calculator
What is Unix Time?
UNIX time, also known as UNIX Epoch Time, is the number of seconds since January 1, 1970 UTC. It ignores leap seconds and treats all days as exactly 86,400 seconds in length.
The Year 2038 Problem
Historically, many computers stored UNIX timestamps in a signed 32 bit integer. Interestingly, 32 bits seems like enough space to store a large number, but will eventually 'run out' of seconds – much like how storing 2 digit years led to the Y2K problem.
A signed integer can represent:
Time & Date Calculator Add Weeks
And January 1, 1970 + 2147483647 seconds = 03:14:17 AM January 19, 2038. (Note that the other sign – negative – can represent negative dates, or times before 1970).
Beyond that time, you can't represent seconds since 1970 using 32 bit signed numbers. Representations that use 64 bit numbers (or higher) can handle the foreseeable future with ease. Shree dev7 0714 font free download. (This calculator can handle dates beyond 2038).
Using the Date to UNIX Time Calculator
Date Time Calculation
To use the Date to UNIX epoch calculator, simply enter a date and time in the Date and Time to Convert field. Next, hit the Calculate Timestamp from Date button and we'll calculator how many seconds your input is after (or before) January 1, 1970.
Date Time Calcuilator
We'll show an answer assuming your entry was UTC or Universal Time, as well as an answer for your local time zone.
Next, enjoy some other calculators and tools.