Where can I sign the calligraphy?

On the right, on the left.

Calligraphy inscriptions are generally divided into two sections. Common is a single paragraph, that is, only the next paragraph. In the preceding paragraph, the object of work is generally expressed like this, such as:

Mr. xx is elegant/upright/upright. ...

The format of the next paragraph is:

Time (usually not Gregorian calendar)+(%location)+author+(respect) book

Such as: "1898 (Xiahuan) 100-day Spring Festival to worship books in the ancient style hall XX".

In traditional calligraphy, dates are marked by years, and months are marked by lunar calendar, not specific to a certain day.