The international standard date notation is where YYYY is the year in the usual Gregorian calendar, MM is the month of the year between 01 (January) and 12 (December), and DD is the day of the month between 01 and 31.
For example, the fourth day of February in the year 1995 is written in the standard notation as Other commonly used notations are e.g.
A week starts with Monday (day 1) and ends with Sunday (day 7).
like 1/1/0), it has been suggested that the year 2000 is an excellent opportunity to change to the standard date notation.ISO 8601 is only specifying numeric notations and does not cover dates and times where words are used in the representation.ISO 8601 should however be used to replace notations such as “2/4/95” and “9.30 p.m.”.Apart from the recommended primary standard notation YYYY-MM-DD, ISO 8601 also specifies a number of alternative formats for use in applications with special requirements.In this case, the Sunday of week 52 would be day number 3 52*7=367, i.e.
only the last 367-365=2 days of the W52 reach into the next year and consequently, even a worst case year like 1999 has a week W52 including the days 1999-12-27 to 2000-01-02. Both day and year are useful units of structuring time, because the position of the sun on the sky, which influences our lives, is described by them.
It is not intended as a replacement for language-dependent worded date notations such as “24.
Dezember 2001” (German) or “February 4, 1995” (US English).
The date notation 2/4/5 has at least six reasonable interpretations (assuming that only the twentieth and twenty-first century are reasonable candidates in our life time).
Advantages of the ISO 8601 standard date notation compared to other commonly used variants: As dates will look a little bit strange anyway starting with 2000-01-01 (e.g.
Note: The value 60 for ss might sometimes be needed during an inserted leap second in an atomic time scale like Coordinated Universal Time (UTC).