diff --git a/src/components/App.tsx b/src/components/App.tsx
index 14d3c86..6b7b03d 100755
--- a/src/components/App.tsx
+++ b/src/components/App.tsx
@@ -10,16 +10,45 @@ import { Header } from "./header";
 
 import "../assets/scss/App.scss";
 
+const updateRowSelectionInCodap = (latitude: string, longitude: string, day: number) => {
+  // TODO: Issue CODAP API request to highlight appropriate case in the case table, using combination of
+  // Math.floor(day), latitude, and longitude.
+}
+
 export const App: React.FC = () => {
   const [activeTab, setActiveTab] = useState<"location" | "simulation">("location");
   const [latitude, setLatitude] = useState("");
   const [longitude, setLongitude] = useState("");
-  const [dayOfYear, setDayOfYear] = useState<string>("280");
+  const [dayOfYear, setDayOfYear] = useState(171);
   const [locations, setLocations] = useState<ILocation[]>([]);
   const [locationSearch, setLocationSearch] = useState<string>("");
   const [selectedAttrs, setSelectedAttributes] = useState<string[]>(kDefaultOnAttributes);
   const [dataContext, setDataContext] = useState<any>(null);
 
+  const handleDayUpdateInTheSimTab = (day: number) => {
+    console.log("The day of the year has been updated in the simulation tab to: ", day); // TODO: remove it later
+    // We might to debounce this call, as if the animation is on, or user is dragging the slider, there will be
+    // lot of events and API calls to CODAP.
+    updateRowSelectionInCodap(latitude, longitude, Math.floor(day));
+    // Note that we do not need to update dayOfYear state variable. It's useful only for the opposite direction
+    // of the sync process, when user select a row in CODAP and we want to update the day in the simulation tab.
+  };
+
+  const handleCaseSelectionInCodap = (_latitude: string, _longitude: string, day: number) => {
+    // Option 1. Update as much of the plugin state as we can when user selects a case in CODAP. I think this might
+    // be too much, as it'll clear all the inputs in all the tabs and the user will have to re-enter everything
+    // if they were in the middle of something.
+    // setDayOfYear(day);
+    // setLatitude(_latitude);
+    // setLongitude(_longitude);
+    // ...OR...
+    // Option 2. Update only the day of the year, as that's reasonably unobtrusive and useful. We can first check
+    // if user actually selected the case from the same location, and only then update the day of the year.
+    if (latitude === _latitude && longitude === _longitude) {
+      setDayOfYear(day);
+    }
+  }
+
   const { getUniqueLocationsInCodapData } = useCodapData();
   // Store a ref to getUniqueLocationsInCodapData so we can call inside useEffect without triggering unnecessary re-runs
   const getUniqueLocationsRef = useRef(getUniqueLocationsInCodapData);
@@ -90,14 +119,14 @@ export const App: React.FC = () => {
       </div>
       <div className={clsx("tab-content", { active: activeTab === "simulation" })}>
         <SimulationTab
+          locations={locations}
           latitude={latitude}
           longitude={longitude}
           setLatitude={setLatitude}
           setLongitude={setLongitude}
           setLocationSearch={setLocationSearch}
           dayOfYear={dayOfYear}
-          setDayOfYear={setDayOfYear}
-          locations={locations}
+          setDayOfYear={handleDayUpdateInTheSimTab}
         />
       </div>
     </div>
diff --git a/src/components/simulation-tab.tsx b/src/components/simulation-tab.tsx
index f7ea10c..8297b3d 100644
--- a/src/components/simulation-tab.tsx
+++ b/src/components/simulation-tab.tsx
@@ -5,30 +5,32 @@ import Seasons from "../grasp-seasons/components/seasons";
 import "../assets/scss/simulation-tab.scss";
 
 interface SimulationTabProps {
+  locations: ILocation[];
   latitude: string;
   longitude: string;
-  dayOfYear: string;
-  locations: ILocation[];
   setLatitude: (latitude: string) => void;
   setLongitude: (longitude: string) => void;
   setLocationSearch: (search: string) => void;
-  setDayOfYear: (day: string) => void;
+  dayOfYear: number;
+  setDayOfYear: (day: number) => void;
 }
 
 export const SimulationTab: React.FC<SimulationTabProps> = ({
+  locations,
   latitude,
   longitude,
-  locations,
-  dayOfYear,
-  setDayOfYear,
   setLatitude,
   setLongitude,
-  setLocationSearch
+  setLocationSearch,
+  dayOfYear,
+  setDayOfYear,
 }) => {
   return (
     <div className="simulation-tab">
       <div className="seasons-container">
         <Seasons
+          dayOfYear={dayOfYear}
+          setDayOfYear={setDayOfYear}
           latitude={latitude}
           longitude={longitude}
           setLatitude={setLatitude}
diff --git a/src/grasp-seasons/components/seasons.tsx b/src/grasp-seasons/components/seasons.tsx
index 28dcfe9..7f53e16 100644
--- a/src/grasp-seasons/components/seasons.tsx
+++ b/src/grasp-seasons/components/seasons.tsx
@@ -58,16 +58,18 @@ interface IProps {
   initialState?: Partial<ISimState>;
   log?: (action: string, data?: any) => void;
 
+  locations: ILocation[];
   latitude: string;
   longitude: string;
-  locations: ILocation[];
   setLatitude: (latitude: string) => void;
   setLongitude: (longitude: string) => void;
   setLocationSearch: (name: string) => void;
+  dayOfYear: number;
+  setDayOfYear: (day: number) => void;
 }
 
 const Seasons: React.FC<IProps> = ({ lang = "en_us", initialState = {}, log = (action: string, data?: any) => {},
-  latitude, longitude, locations, setLatitude, setLongitude, setLocationSearch }) => {
+  locations, latitude, longitude, setLatitude, setLongitude, setLocationSearch, dayOfYear, setDayOfYear }) => {
   const orbitViewRef = useRef<OrbitViewComp>(null);
 
   // State
@@ -81,11 +83,13 @@ const Seasons: React.FC<IProps> = ({ lang = "en_us", initialState = {}, log = (a
   const { animationStarted: mainAnimationStarted, toggleState: toggleMainAnimation } = useAnimation({
     value: simState.day,
     setValue: (newDay: number) => {
-      const stateUpdate: Partial<ISimState> = { day: newDay % 365 };
+      const day = newDay % 365;
+      const stateUpdate: Partial<ISimState> = { day };
       if (simState.dailyRotation) {
         stateUpdate.earthRotation = (newDay % 1) * 2 * Math.PI;
       }
       setSimState(prevState => ({ ...prevState, ...stateUpdate }));
+      setDayOfYear(day);
     },
     speed: simState.dailyRotation ? DAILY_ROTATION_ANIM_SPEED : ANIM_SPEED
   });
@@ -120,6 +124,10 @@ const Seasons: React.FC<IProps> = ({ lang = "en_us", initialState = {}, log = (a
     }
   }, [longitude]);
 
+  useEffect(() => {
+    setSimState(prevState => ({ ...prevState, day: dayOfYear }));
+  }, [dayOfYear]);
+
   // Derived state
   const simLang = simState.lang;
   const playStopLabel = mainAnimationStarted ? t("~STOP", simLang) : t("~ORBIT_BUTTON", simLang);
@@ -160,10 +168,14 @@ const Seasons: React.FC<IProps> = ({ lang = "en_us", initialState = {}, log = (a
       setLongitude(formatLatLongNumber(newState.long));
       setLocationSearch("");
     }
+    if (newState.day !== undefined) {
+      setDayOfYear(newState.day);
+    }
   };
 
   const handleDaySliderChange = (event: any, ui: any) => {
     setSimState(prevState => ({ ...prevState, day: ui.value }));
+    setDayOfYear(ui.value);
   };
 
   const handleDayIncrement = (increment: number) => () => {