Quote:
Originally Posted by shall1028
I don't know why Sigil can't set a year older than 1752 but a clue might be had if you consider that 1752 was the year that the Gregorian calendar was adopted in England and the Eastern portion of what is now the United States. This supplanted the old Julian calendar.
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Dublin Core (i.e. "dc:") is using ISO 8601, from
Wikipedia:
Quote:
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ISO 8601 fixes a reference calendar date to the Gregorian calendar of 1875-05-20 as the date the Convention du Mètre (Metre Convention) was signed in Paris. However, ISO calendar dates before the Convention are still compatible with the Gregorian calendar all the way back to the official introduction of the Gregorian calendar on 1582-10-15. Earlier dates, in the proleptic Gregorian calendar, may be used by mutual agreement of the partners exchanging information. The standard states that every date must be consecutive, so usage of the Julian calendar would be contrary to the standard (because at the switchover date, the dates would not be consecutive).
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For most purposes, the proleptic Gregorian calendar is "good enough" so the only requirement should be a 4 digit year. I assume book software (Calibre, for example) just uses a textual sort on dates, so anything after 0000-01-01 should work.