diff --git a/simulations/validation/config1.py b/simulations/validation/config1.py
index d2a8f2b..1a98822 100644
--- a/simulations/validation/config1.py
+++ b/simulations/validation/config1.py
@@ -79,8 +79,8 @@ def es4p2(_g, step, sL, s, _input):
 ts_format = '%Y-%m-%d %H:%M:%S'
 t_delta = timedelta(days=0, minutes=0, seconds=1)
 def es5p2(_g, step, sL, s, _input):
-    y = 'timestep'
-    x = ep_time_step(s, dt_str=s['timestep'], fromat_str=ts_format, _timedelta=t_delta)
+    y = 'timestamp'
+    x = ep_time_step(s, dt_str=s['timestamp'], fromat_str=ts_format, _timedelta=t_delta)
     return (y, x)
 
 
@@ -99,14 +99,14 @@ genesis_states = {
     's2': Decimal(0.0),
     's3': Decimal(1.0),
     's4': Decimal(1.0),
-#     'timestep': '2018-10-01 15:16:24'
+    'timestamp': '2018-10-01 15:16:24'
 }
 
 
 raw_exogenous_states = {
     "s3": es3p1,
     "s4": es4p2,
-#     "timestep": es5p2
+    "timestamp": es5p2
 }
 
 
diff --git a/simulations/validation/config2.py b/simulations/validation/config2.py
index 80adcb5..ebba912 100644
--- a/simulations/validation/config2.py
+++ b/simulations/validation/config2.py
@@ -77,8 +77,8 @@ def es4p2(_g, step, sL, s, _input):
 ts_format = '%Y-%m-%d %H:%M:%S'
 t_delta = timedelta(days=0, minutes=0, seconds=1)
 def es5p2(_g, step, sL, s, _input):
-    y = 'timestep'
-    x = ep_time_step(s, dt_str=s['timestep'], fromat_str=ts_format, _timedelta=t_delta)
+    y = 'timestamp'
+    x = ep_time_step(s, dt_str=s['timestamp'], fromat_str=ts_format, _timedelta=t_delta)
     return (y, x)
 
 
@@ -97,14 +97,14 @@ genesis_states = {
     's2': Decimal(0.0),
     's3': Decimal(1.0),
     's4': Decimal(1.0),
-#     'timestep': '2018-10-01 15:16:24'
+    'timestamp': '2018-10-01 15:16:24'
 }
 
 
 raw_exogenous_states = {
     "s3": es3p1,
     "s4": es4p2,
-#     "timestep": es5p2
+    "timestamp": es5p2
 }
 
 
diff --git a/simulations/validation/sweep_config.py b/simulations/validation/sweep_config.py
index c9c92ab..04f5698 100644
--- a/simulations/validation/sweep_config.py
+++ b/simulations/validation/sweep_config.py
@@ -95,7 +95,7 @@ ts_format = '%Y-%m-%d %H:%M:%S'
 t_delta = timedelta(days=0, minutes=0, seconds=1)
 def es5p2(_g, step, sL, s, _input):
     y = 'timestamp'
-    x = ep_time_step(s, dt_str=s['timestep'], fromat_str=ts_format, _timedelta=t_delta)
+    x = ep_time_step(s, dt_str=s['timestamp'], fromat_str=ts_format, _timedelta=t_delta)
     return (y, x)
 
 
@@ -112,6 +112,7 @@ genesis_states = {
     's2': Decimal(0.0),
     's3': Decimal(1.0),
     's4': Decimal(1.0),
+    'timestamp': '2018-10-01 15:16:24'
 }
 
 
@@ -119,6 +120,7 @@ genesis_states = {
 raw_exogenous_states = {
     "s3": es3p1,
     "s4": es4p2,
+    'timestamp': es5p2
 }
 
 triggered_env_b = proc_trigger(1, env_b)