At what time was Daniel's second vision given?

Answer

"In the first year of Belshazzar king of Babylon Daniel had a dream and visions of his head upon his bed:
then he wrote the dream, and told the sum of the matters." Dan. 7:1.
NOTE - That is, in the first year of Belshazzar's office as associate king with his father
Nabonadius, or 540 BC.

Who is this dragon?
How is the church of the last days described?
Was the Sabbath designed to be a day for public worship?
Where did he say he would wait?
Why did God give His only begotten Son to the world?
Who witnessed the laying of the foundations of the earth?
Does He afflict to leave the one chastened in despair?

Questions & Answers are from the book Bible Readings for the Home Circle