diff --git a/data/cases.csv b/data/cases.csv
new file mode 100644
index 0000000..cc53eac
--- /dev/null
+++ b/data/cases.csv
@@ -0,0 +1,4 @@
+CaseID,PatientID,Station,EKT,Erhaltung,Ket,Date
+1,21-239,1,15,0,no,28/11/2024
+2,21-237,0,22,1,no,29/11/2024
+3,21-238,3,12,1,no,30/11/2024
diff --git a/data/patients.csv b/data/patients.csv
new file mode 100644
index 0000000..3662b41
--- /dev/null
+++ b/data/patients.csv
@@ -0,0 +1,12 @@
+Id,PatientID,Patient,Station
+1,21-239,Hans Zimmer,1
+2,21-237,Lina Gruber,0
+3,21-238,Victoria J,3
+4,21-229,Hilmario Maggio,3
+5,21-249,Egon Schiele,2
+6,21-219,Hans Landa,1
+7,21-213,Gregor Samsa,1
+8,21-222,Johanne,2
+9,21-223,Angela Merkel,1
+10,21-240,Britney Spears,3
+11,21-241,Madonna,0
diff --git a/data/sessions.csv b/data/sessions.csv
new file mode 100644
index 0000000..d84a04e
--- /dev/null
+++ b/data/sessions.csv
@@ -0,0 +1,5 @@
+SessionID,Date,Start,End,Duration,ConsultantID,Specialty
+1001,03/06/2020,08:30:00,18:00:00,570,11,Ophthalmology
+1002,10/06/2020,08:30:00,18:00:00,570,11,Ophthalmology
+1003,17/06/2020,08:30:00,18:00:00,570,11,Ophthalmology
+1004,25/06/2020,08:30:00,13:00:00,270,11,Ophthalmology
diff --git a/opt.py b/opt.py
index 45d5dc6..dc01f74 100644
--- a/opt.py
+++ b/opt.py
@@ -3,6 +3,7 @@ solver = SolverFactory('glpk')
 
 import pandas as pd
 import pyomo.environ as pyo
+import datetime
 # Create a model
 model = pyo.ConcreteModel()
 
@@ -54,6 +55,11 @@ def date2int(date):
     week = int((delta - day)/7)
     return week,day
 
+def int2date(week, day):
+    d0 = pd.to_datetime("25/11/2024", dayfirst=True)
+    delta = datetime.timedelta(days = 7*week + day)
+    date = d0 + delta
+    return date
 
 path = '/home/hmag/code/pyomo/data'
 my = Scheduler(path+'/cases.csv', path+'/sessions.csv', path+'/patients.csv')
@@ -67,3 +73,5 @@ print(my.df_cases['Date'][0])
 date = my.df_cases['Date'][0]
 
 print(date2int(date))
+print(int2date(1,0))
+