# Duration

A string representing a duration conforming to the ISO8601 standard, such as: P1W1DT13H23M34S P is the duration designator (for period) placed at the start of the duration representation. Y is the year designator that follows the value for the number of years. M is the month designator that follows the value for the number of months. W is the week designator that follows the value for the number of weeks. D is the day designator that follows the value for the number of days. T is the time designator that precedes the time components of the representation. H is the hour designator that follows the value for the number of hours. M is the minute designator that follows the value for the number of minutes. S is the second designator that follows the value for the number of seconds.

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Note the time designator, T, that precedes the time value.
Matches moment.js, Luxon and DateFns implementations,/. is valid for decimal places and +/- is a valid prefix
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