diff --git a/gravity-and-orbits-strings_en.json b/gravity-and-orbits-strings_en.json
index 75cdd423..84de717c 100644
--- a/gravity-and-orbits-strings_en.json
+++ b/gravity-and-orbits-strings_en.json
@@ -11,9 +11,6 @@
   "ourSun": {
     "value": "Our Sun"
   },
-  "earthDay": {
-    "value": "Earth Day"
-  },
   "planet": {
     "value": "Planet"
   },
@@ -95,9 +92,6 @@
   "ourMoon": {
     "value": "Our Moon"
   },
-  "earthMinute": {
-    "value": "Earth Minute"
-  },
   "returnObjects": {
     "value": "Return Objects"
   },
diff --git a/js/GravityAndOrbitsStrings.ts b/js/GravityAndOrbitsStrings.ts
index ce82ea85..04e67574 100644
--- a/js/GravityAndOrbitsStrings.ts
+++ b/js/GravityAndOrbitsStrings.ts
@@ -19,8 +19,6 @@ type StringsType = {
   'earthMassesStringProperty': LinkableProperty<string>;
   'ourSun': string;
   'ourSunStringProperty': LinkableProperty<string>;
-  'earthDay': string;
-  'earthDayStringProperty': LinkableProperty<string>;
   'planet': string;
   'planetStringProperty': LinkableProperty<string>;
   'planetMass': string;
@@ -77,8 +75,6 @@ type StringsType = {
   'pathStringProperty': LinkableProperty<string>;
   'ourMoon': string;
   'ourMoonStringProperty': LinkableProperty<string>;
-  'earthMinute': string;
-  'earthMinuteStringProperty': LinkableProperty<string>;
   'returnObjects': string;
   'returnObjectsStringProperty': LinkableProperty<string>;
   'star': string;
diff --git a/js/common/SceneFactory.ts b/js/common/SceneFactory.ts
index db4e6151..27843a2f 100644
--- a/js/common/SceneFactory.ts
+++ b/js/common/SceneFactory.ts
@@ -374,14 +374,12 @@ const getSwitchableRenderer = ( image1: string | HTMLImageElement, image2: strin
 const scaledDays = ( timeProperty: TProperty<number>, tandem: Tandem ) => {
   return new DerivedProperty( [
     timeProperty,
-    GravityAndOrbitsStrings.earthDayStringProperty,
     GravityAndOrbitsStrings.earthDaysStringProperty,
     GravityAndOrbitsStrings.pattern[ '0value' ][ '1unitsStringProperty' ]
-  ], ( time, earthDayString, earthDaysString, patternString ) => {
+  ], ( time, earthDaysString, patternString ) => {
     const value = ( time / GravityAndOrbitsClock.SECONDS_PER_DAY );
     const fixedValue = Utils.toFixed( value, 0 );
-    const units = ( fixedValue === '1' ) ? earthDayString : earthDaysString;
-    return StringUtils.format( patternString, fixedValue, units );
+    return StringUtils.format( patternString, fixedValue, earthDaysString );
   }, {
     tandem: tandem,
     phetioValueType: StringIO
@@ -395,14 +393,12 @@ const scaledDays = ( timeProperty: TProperty<number>, tandem: Tandem ) => {
 const formatMinutes = ( timeProperty: TProperty<number>, tandem: Tandem ) => {
   return new DerivedProperty( [
     timeProperty,
-    GravityAndOrbitsStrings.earthMinuteStringProperty,
     GravityAndOrbitsStrings.earthMinutesStringProperty,
     GravityAndOrbitsStrings.pattern[ '0value' ][ '1unitsStringProperty' ]
-  ], ( time, earthMinuteString, earthMinutesString, patternString ) => {
+  ], ( time, earthMinutesString, patternString ) => {
     const value = ( time / SECONDS_PER_MINUTE );
     const fixedValue = Utils.toFixed( value, 0 );
-    const units = ( fixedValue === '1' ) ? earthMinuteString : earthMinutesString;
-    return StringUtils.format( patternString, fixedValue, units );
+    return StringUtils.format( patternString, fixedValue, earthMinutesString );
   }, {
     tandem: tandem,
     phetioValueType: StringIO