Biblical prophetic time

It is well established that biblical prophetic time is calculated using the year-day principle, in which one prophetic day equals one year of actual time.  The principle is based on: 

Nu 14:34  After the number of the days in which ye searched the land, even forty days, each day for a year, shall ye bear your iniquities, even forty years, and ye shall know my breach of promise. 

Eze 4:6  And when thou hast accomplished them, lie again on thy right side, and thou shalt bear the iniquity of the house of Judah forty days: I have appointed thee each day for a year. 

The year-day principle was established in 380 AD, and is accepted widely today. 

Note. A Biblical year = 360 days (a biblical month = 30 days). This is how ancient Israel reckoned the year, and is thus how we calculate prophetic time. 

However, the 360 day year is based on the Lunar year, which is mismatched with the Solar year of 3651/4 days.  To deal with this disparity, seven times every nineteen years an extra month was added to the ancient calendar.