User:Jc3s5h/Wikidata user interface test cases

In the following table conversions from year, month, and day, where days begin at midnight, and Julian day, which begins at noon, are performed at noon for the day in question. The convention that the year 0 exists and is equal to 1 BC is followed in this table and ought to be used in the user interface, since that is the convention followed by astronomers since 1740 and the current version of ISO 8601 (the 2004 edition).