perl-Date-ISO8601

The international standard ISO 8601 "Data elements and interchange formats - Information interchange - Representation of dates and times" defines three distinct calendars by which days can be labeled. It also defines textual formats for the representation of dates in these calendars. This module provides functions to convert dates between these three calendars and Chronological Julian Day Numbers, which is a suitable format to do arithmetic with. It also supplies functions that describe the shape of these calendars, to assist in calendrical calculations. It also supplies functions to represent dates textually in the ISO 8601 formats. ISO 8601 also covers time of day and time periods, but this module does nothing relating to those parts of the standard; this is only about labeling days.

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