a b "International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October 1884. Protocols of the proceedings". Project Gutenberg. 1884 . Retrieved 30 November 2012. In the 24-hour time notation, the day begins at midnight, 00:00 or 0:00, and the last minute of the day begins at 23:59. Where convenient, the notation 24:00 may also be used to refer to midnight at the end of a given date [3]— that is, 24:00 of one day is the same time as 00:00 of the following day. No hours/minutes separator is used when writing the time, and a letter designating the time zone is appended (for example "0340Z"). Andy gets five out of 15 questions wrong in his math test. What fraction of the question does andy answer correctly? German (Gallic) hours (half-dial): 2×12 hour system starting at midnight and restarted at noon. It is typical with the 12-hour dial with 12 at the top.

Blaise, Clark (2001). Time lord: Sir Sandford Fleming and the creation of standard time. New York: Pantheon Books. pp. 81–82. ISBN 978-0-375-40176-3. Samantha took 72 pictures on her beach vacation. 3/4 of those pictures are on the beach. How many pictures from her vacation are on the beach? Now button will set the starting time to the current time. And the clear button resets the time inputs. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of full minutes that have passed since the last full hour, and ss (00 to 59) is the number of seconds since the last full minute. In the case of a leap second, the value of ss may extend to 60. A leading zero is added for numbers under 10, but it is optional for the hours. The leading zero is very commonly used in computer applications, and always used when a specification requires it (for example, ISO 8601). Bailey IL, Lovie JE (2013). Visual acuity testing. From the laboratory to the clinic. Vision Research 90: 2-9. doi:10.1016/j.visres.2013.05.004.The notation 24:00 mainly serves to refer to the exact end of a day in a time interval. A typical usage is giving opening hours ending at midnight (e.g. "00:00–24:00", "07:00–24:00"). Similarly, some bus and train timetables show 00:00 as departure time and 24:00 as arrival time. Legal contracts often run from the start date at 00:00 until the end date at 24:00.

Adams, Anthony J.; Lovie-Kitchin, Jan (2004). "Ian L Bailey". Clinical and Experimental Optometry. 87 (1): 37–41. doi: 10.1111/j.1444-0938.2004.tb03145.x. ISSN 1444-0938. PMID 14720120. S2CID 27795798. a b c "Memorandum CAB 24/110/21 (CP 1721), 'Report of the Committee upon the 24 hour method of expressing time' ". The National Archives, Kew, United Kingdom. 4 August 1920. Form 781C, Avionics Configuration and Load Status Document (Figure 5-6 andFigure 5-7) .. FORM 781E, ACCESSORY REPLACEMENT (Figure 5-8 and Figure 5-9).. FORM 781F, AEROSPACE VEHICLE IDENTIFICATION DOCUMENT (Figure 5-10) .. Form 781G, General Mission Classification-Mission Symbols (Figure 5-11 andFigure 5-12) .. Form 781H, Aerospace Vehicle Flight Status and Maintenance Document (Figure 5-13and Figure 5-14) .. Form 781J, Aerospace Vehicle Engine Flight Document (Figure 5-15 and Figure 5-16) .. Form 781K, Aerospace Vehicle Inspection, Engine Data, Calendar Inspection, andDelayed Discrepancy Document (Figure 5-17 and Figure 5-18) .. Form 781M, Status Symbols and Functional System Codes (Figure 5-19 andFigure 5-20) .. FORM 781P, SUPPORT GENERAL DOCUMENTATION (Figure 5-21). Where subsecond resolution is required, the seconds can be a decimal fraction; that is, the fractional part follows a decimal dot or comma, as in 01:23:45.678. The most commonly used separator symbol between hours, minutes and seconds is the colon, which is also the symbol used in ISO 8601. In the past, some European countries used the dot on the line as a separator, but most national standards on time notation have since then been changed to the international standard colon. In some contexts (including some computer protocols), no separator is used and times are written as, for example, "2359". A logMAR chart ( Logarithm of the Minimum Angle of Resolution) is a chart consisting of rows of letters that is used by ophthalmologists, orthoptists, optometrists, and vision scientists to estimate visual acuity. The chart was developed at the National Vision Research Institute of Australia in 1976, and is designed to enable a more accurate estimate of acuity than do other charts (e.g., the Snellen chart). [1] For this reason, the LogMAR chart is recommended, particularly in a research setting. [2]Local time is designated as zone J or " Juliett". "1200J" ("twelve hundred Juliett") is noon local time. The following fraction is reduced to its lowest terms except one. Which of these: A.98/99 B.73/179 C.1/250 D.81/729

Carlson, Kurts, Nancy, Daniel (2004). Clinical Procedures of Ocular Examination. U.S.A: McGraw HIll. p.10. ISBN 978-0-07-137078-3. {{ cite book}}: CS1 maint: multiple names: authors list ( link) Communication Instructions General ACP 121(I)" (PDF). Archived from the original (PDF) on 2016-05-08.

Math

At the International Meridian Conference in 1884, American lawyer and astronomer Lewis M. Rutherfurd proposed: a b Communication instructions – General (PDF). Combined Communications-Electronics Board. October 2010. p.3-6. ACP 121(I). Archived from the original (PDF) on 2011-08-07.