diff --git a/prescient/engine/egret/egret_plugin.py b/prescient/engine/egret/egret_plugin.py
index 8dd5101..e852e94 100644
--- a/prescient/engine/egret/egret_plugin.py
+++ b/prescient/engine/egret/egret_plugin.py
@@ -105,6 +105,7 @@ def _zero_out_costs(sced_model, hours_in_objective):
 # TBD - we probably want to grab topology from somewhere, even if the stochastic 
 #       RUC is not solved with the topology.
 def create_sced_instance(data_provider:DataProvider,
+                         when: datetime.datetime,
                          current_state:SimulationState,
                          options,
                          sced_horizon,
@@ -239,6 +240,12 @@ def create_sced_instance(data_provider:DataProvider,
             # make sure the generator can immediately turn off
             g_dict['shutdown_capacity'] = max(g_dict['shutdown_capacity'], (60./current_state.minutes_per_step)*g_dict['initial_p_output'] + 1.)
 
+    # Set the time keys
+    timekey_array = sced_md.data['system']['time_keys']
+    for t in range(sced_horizon):
+        dt = when + datetime.timedelta(minutes=t*current_state.minutes_per_step)
+        timekey_array[t] = dt.strftime('%Y-%m-%d %H:%M')
+
     return sced_md
 
 # cache for shutdown curves
diff --git a/prescient/engine/egret/engine.py b/prescient/engine/egret/engine.py
index 2f1fcbe..b6ba408 100644
--- a/prescient/engine/egret/engine.py
+++ b/prescient/engine/egret/engine.py
@@ -133,6 +133,7 @@ def create_simulation_actuals(
 
     def create_sced_instance(self,
             options: Options,
+            when: datetime.datetime,
             current_state: SimulationState,
             hours_in_objective: int,
             sced_horizon: int,
@@ -143,6 +144,7 @@ def create_sced_instance(self,
 
         current_sced_instance = self._p.create_sced_instance(
             self._data_provider,
+            when,
             current_state,
             options,
             sced_horizon,
diff --git a/prescient/engine/modeling_engine.py b/prescient/engine/modeling_engine.py
index ffb8395..fe3a9e3 100644
--- a/prescient/engine/modeling_engine.py
+++ b/prescient/engine/modeling_engine.py
@@ -95,6 +95,7 @@ def create_simulation_actuals(
     @abstractmethod
     def create_sced_instance(self,
             options: Options,
+            when: datetime.datetime,
             current_state: SimulationState,
             hours_in_objective: int,
             sced_horizon: int,
diff --git a/prescient/simulator/oracle_manager.py b/prescient/simulator/oracle_manager.py
index 54929c3..984bdb9 100644
--- a/prescient/simulator/oracle_manager.py
+++ b/prescient/simulator/oracle_manager.py
@@ -46,7 +46,7 @@ def _get_uc_activation_time(self, options, time_step):
         ruc_delay = self._get_ruc_delay(options)
         activation_time = time_step.datetime + timedelta(hours=ruc_delay)
 
-        return (activation_time.hour, activation_time.date())
+        return activation_time
 
     def _get_projected_state(self, options: Options, time_step: PrescientTime) -> SimulationState:
         ''' Get the simulation state as we project it will appear after the RUC delay '''
@@ -59,10 +59,10 @@ def _get_projected_state(self, options: Options, time_step: PrescientTime) -> Si
             print("Drawing UC initial conditions for date:", time_step.date, "hour:", time_step.hour, "from prior SCED instance.")
             return self.data_manager.current_state
 
-        uc_hour, uc_date = self._get_uc_activation_time(options, time_step)
+        act_time = self._get_uc_activation_time(options, time_step)
 
         print("")
-        print("Creating and solving SCED to determine UC initial conditions for date:", str(uc_date), "hour:", uc_hour)
+        print("Creating and solving SCED to determine UC initial conditions for date:", str(act_time.date()), "hour:", act_time.hour)
 
         # determine the SCED execution mode, in terms of how discrepancies between forecast and actuals are handled.
         # prescient processing is identical in the case of deterministic and stochastic RUC.
@@ -81,6 +81,7 @@ def _get_projected_state(self, options: Options, time_step: PrescientTime) -> Si
         current_state = self.data_manager.current_state.get_state_with_step_length(60)
         projected_sced_instance = self.engine.create_sced_instance(
             options,
+            act_time,
             current_state,
             hours_in_objective=min(24, current_state.timestep_count),
             sced_horizon=min(24, current_state.timestep_count),
@@ -129,8 +130,8 @@ def call_planning_oracle(self, options: Options, time_step: PrescientTime) -> No
         ''' Create a new RUC and make it the pending RUC
         '''
         projected_state = self._get_projected_state(options, time_step)
-        uc_hour, uc_date = self._get_uc_activation_time(options, time_step)
-        self._generate_pending_ruc(options, uc_date, uc_hour, projected_state)
+        act_time = self._get_uc_activation_time(options, time_step)
+        self._generate_pending_ruc(options, act_time.date(), act_time.hour, projected_state)
 
     def _formulate_ruc(self, options, uc_date, uc_hour, sim_state_for_ruc):
         '''Create a RUC model holding forecast data.
@@ -251,6 +252,7 @@ def call_operation_oracle(self, options: Options, time_step: PrescientTime):
         sced_horizon_timesteps = options.sced_horizon
         current_sced_instance = self.engine.create_sced_instance(
             options,
+            time_step.datetime,
             self.data_manager.current_state.get_state_with_step_length(options.sced_frequency_minutes),
             hours_in_objective=1,
             sced_horizon=sced_horizon_timesteps,