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In Russia, dates are usually written in "day month year" (DMY) order. The 12-hour notation is often used in the spoken language, and the 24-hour notation is used in writing.
In Russia, dates are usually written in "day month year" (DMY) order. This order is used in both the all-numeric date (for example "28.08.17") and the expanded form (for example "28 августа 2017 г.". Note: The trailing "г" is short for "года" ("of the year"). Coincidentally, in Polish the word for year is "rok", so a similar date format is used by the Poles e.g. 1987r). Single-digit numbers for day or month may have a preceding zero (for example "28.08.2017") is more usual.
When saying the date, it is usually pronounced using the ordinal number of the day first (in neutral grammatical gender), then the month in genitive case (for example "Двадцать восьмое августа").
The first day of the week in Russia is Monday.
Russia used the Byzantine calendar up to 1700, the Julian calendar between 1700 and 1918, and the Gregorian calendar since 1918. Until the final years of Peter the Great in the early 1720s, Russia used Cyrillic numerals to denote dates on coins. Thus, for example, СИ (208) denoted 7208 AM (1 September 1699 through 31 August 1700 (O.S.), this means that the year 7208 of the old Russian calendar, it was a short year with only four months running from 1 September to 31 December 1699 O.S.) and ҂АѰ (1700) denoted AD 1700 OS (which began on 1 January).
The 12-hour notation is often used in the spoken language. The 24-hour notation is used in writing, with a colon as the standardised and recommended separator (e.g. “9:07”). Sometimes full stop is used as a separator (e.g. 9.07), or (in handwritten text) the minutes may be written as superscript and underlined (e.g. 907).
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A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "25 April 2024" is ten days after "15 April 2024". The date of a particular event depends on the observed time zone. For example, the air attack on Pearl Harbor that began at 7:48 a.m. Hawaiian time on 7 December 1941 took place at 3:18 a.m. Japan Standard Time, 8 December in Japan.
Old Style (O.S.) and New Style (N.S.) indicate dating systems before and after a calendar change, respectively. Usually, they refer to the change from the Julian calendar to the Gregorian calendar as enacted in various European countries between 1582 and 1923.
Different conventions exist around the world for date and time representation, both written and spoken.
Date and time notation in the United States differs from that used in nearly all other countries. It is inherited from one historical branch of conventions from the United Kingdom. American styles of notation have also influenced customs of date notation in Canada, creating confusion in international commerce.
In Finland, the usual way of writing dates in normal text is with the months spelled out. The format varies according to the language used. In Finnish, a full stop is placed after the day to indicate an ordinal: 31. toukokuuta 2002; furthermore, the month is in the partitive case, always marked by -ta. The month can also be written first, now in genitive case : toukokuun 31. pnä 2002. In Swedish, the full stop is not used and the month is in nominative : den 31 maj 2002.
France most commonly records the date using the day-month-year format with an oblique stroke or slash as the separator with numerical values. The 24-hour clock is used to express time, using the letter h as the separator in between hours and minutes.
Date and time notation in Sweden mostly follows the ISO 8601 standard: dates are generally written in the form YYYY-MM-DD. Although this format may be abbreviated in a number of ways, almost all Swedish date notations state the month between the year and the day. Months are not capitalised when written. The week number may also be used in writing and in speech. Times are generally written using 24-hour clock notation, with full stops as separators, although 12-hour clock notation is more frequently used in speech.
Date and time notation in the United Kingdom records the date using the day–month–year format. The ISO 8601 format (1999-12-31) is increasingly used for all-numeric dates. The time can be written using either the 24-hour clock (23:59) or the 12-hour clock (11:59 p.m.).
The European Committee for Standardization (CEN) and (CENELEC) adopted ISO 8601 with EN 28601, now EN ISO 8601. As a European Norm, CEN and CENELEC member states are obligated to adopt the standard as national standard without alterations as well.
ISO 8601 has been adopted as BIS IS 7900:2001.
Date and time notation in Japan has historically followed the Japanese calendar and the nengō system of counting years. At the beginning of the Meiji period, Japan switched to the Gregorian calendar on Wednesday, 1 January 1873, but for much domestic and regional government paperwork, the Japanese year is retained. Japanese people and businesses have also adopted various conventions in accordance with their use of kanji, the widespread use of passenger trains, and other aspects of daily life.
Date and time notation in Italy records the date using the day–month–year format. The time is written using the 24-hour clock (02:49); in spoken language and informal contexts the 12-hour clock is more commonly adopted, but without using "a.m." or "p.m." suffixes (2:49).
Nepal uses both the DMY and YMD format when writing dates, and uses 12-hour format for time.
This article is about date and time notation in Mongolia.
Date and time notation in New Zealand most commonly records the date using the day-month-year format, while the ISO 8601 format (2024-04-10) is increasingly used for all-numeric dates, such as date of birth. The time can be written using either the 12-hour clock or the 24-hour clock (07:05).
