Validating dates in rails
The day of calendar reform denotes the start day of the new style.
The old style of the West is the Julian calendar which was adopted by Caesar.
In this document, the astronomical modified Julian day number is the same as the original modified Julian day number.
In this class, BCE years are counted astronomically.
Thus, the year before the year 1 is the year zero, and the year preceding the year zero is the year -1.
0900) %:z - hour and minute offset from UTC with a colon (e.g.
) %::z - hour, minute and second offset from UTC (e.g.