January 2013 (UTC)

In the absence of any response on this, I've decided to make the article consistent by changing all 1801s to 1800 except where there's a clear reason not to do so, and to explain in the introduction that it ceased to exist on the last day of 1800. If anybody then knows of a good reason for keeping some particular 1801, they are free to change it thmselves.   00:28, 28