The most commonly used of these strings (and their abbreviations) includes day (d), hour (hr, h), minute (min), second (sec, s), year(yr). Plural forms are also acceptable. The date string may include date alone; date and time; or date, time, and time zone.<br />
It is recommended that the unit "year" not be used as a unit of time.Year is an ambiguous unit as years are of varying length. Udunits defines a year as exactly 365 days.</p>
<p>A time coordinate variable is identifiable from its units string,alone