/* © Written by cwdjrxyz@yahoo.com in 2002 and greatly revised in May 2003. */
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blab='Perpetual Calendars for a full year are generated for year 1 to year 60000. Of course there likely will be new calendar changes before 60000.These calendars are for England, the USA, and many other English speaking countries that changed from the Julian to Gregorian calendar in 1752. They are all official calendars for each year, not \"what if\" calendars that indicate what the past dates would be if the present Gregorian calendar had been used before 1752. Some countries, mainly Roman Catholic dominated, converted to the Gregorian calendar in 1582. Others converted as late as the 1920s. Thus, for older dates, you must know when the Gregorian calender was adopted in the country of interest and select a calendar that uses that conversion date.
George Washington was born on Feb. 9 of 1732 before the Gregorian transformation. This is his legal birth date. The date of Feb. 22, 1732, often quoted is a \"what if\" date. It is the date he would have been born if the present calendar system were being used back then, but it was not. Failure to distinguish between true official dates and \"what if\" dates has caused much confusion. An old date should never be quoted alone if it is a \"what if\" date. An explanation of what it is should be included.
BC dates are not included. There is uncertainty about leap years, etc. for BC dates, so they should be considered as good estimates.
Needless to say many other calendar systems have been used. It may never be possible to relate some of the older of these to modern western calendars. Someone even made a calendar for Mars.';
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