use shared define of END_YEAR

calc.py

@@ -1,5 +1,6 @@
 # calc.py
 from datetime import datetime, timedelta
+from defines import END_YEAR
 
 # GLOBAL CONSTANTS
 LEASE = 0
@@ -90,7 +91,7 @@ def calculate_savings_depletion(finance):
 
     # main loop range -- start from now, and simulate till D is 60 (April 2031)
     current_date = datetime.today()
-    end_date = datetime(2031, 4, 15)
+    end_date = datetime(END_YEAR, 4, 15)
 
     # Calculate daily living expenses
     daily_living_expenses = Living_Expenses / 365