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The Comptometer was the first commercially successful key-driven mechanical calculator, patented in the United States by Dorr Felt in 1887.. A key-driven calculator is extremely fast because each key adds or subtracts its value to the accumulator as soon as it is pressed and a skilled operator can enter all of the digits of a number simultaneously, using as many fingers as required, making ...
Or simply, using the simpler parameter names, compatible with {{Age in years, months and days}}: {{Age in years, months, weeks and days |month = 1 |day = 1 |year = 1 }} → 2023 years, 11 months, 2 weeks and 6 days; Alternatively, the first set of parameters can be left out to get the time left until a future date, such as the next Wikipedia ...
The format has shortened over time but the order of the elements has remained constant. The following examples use the date of 9 November 2006. (With the years 2000–2009, care must be taken to ensure that two digit years do not intend to be 1900–1909 or other similar years.) The dots have a function of ordinal dot. "9 November 2006" or "9.
This template returns the number of full years, surplus months, and surplus days between two specified dates. If the second set of parameters is not included, it will return the number of years, months and days between a specified date and today's date. Template parameters [Edit template data] Parameter Description Type Status Year ('from' date) 1 year The year of the (first) date Number ...
Animation showing equation of time and analemma path over one year.. The United States Naval Observatory states "the Equation of Time is the difference apparent solar time minus mean solar time", i.e. if the sun is ahead of the clock the sign is positive, and if the clock is ahead of the sun the sign is negative.
Returns the number of full years and surplus days between two specified dates (or, if only one date is entered, between the specified date and today's date) Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Earlier date 1 The earlier date being compared Date required Later date 2 The later date being compared ...
A simplified illustration of the relation between date line, date and time of day. Each colour represents a different date. Example depicting situation at 04:00 GMT Tuesday. (Times are approximate, since time zone boundaries generally do not exactly coincide with meridians.
This template returns the number of weeks and days that have elapsed between two dates. If the second set of parameters is not included it will automatically calculate the pereiod between a given date and today.