Who proposed to who, and when?
Joe proposed to Christie on Saturday, July 22, 2000.

Who is older?
Christie is older than Joe by 33 days.

Who is taller?
Christie is 5'6".
Joe 5'8".
Therefore, Joe is taller than Christie by 2 inches.

Who graduated from UBC first?
We both started going to UBC in 1994.
Christie graduated from UBC Commerce (Accounting) in 1998.
Then, Joe graduated from UBC Electrical Engineering in 1999.
So, Christie graduated from UBC first!