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.
Hard pen calligraphy can be signed in the above traditional or modern format:
20 18 XXX (XX).