Two years: two is a prime number for finance of the UN.I believe that it should be one year.not a prime number.I created numberline.space:found here;https://numberline.space/ .
http://www.unepfi.org/news/25th-anniversary/main/ Happy 25th Leadermaster.
Here is one link to the united nations finance:http://www.unepfi.org/
Here is the link to United Nations Peace Keepers 70th anniversary:https://peacekeeping.un.org/en/department-of-peacekeeping-operations
Here is today 2018 -09-25 first day of the United Nations General Council 47th annual assembly news link:https://news.un.org/en/ .