diff --git a/src/company_base.h b/src/company_base.h
index 490dc85b19..5f0eb3760a 100644
--- a/src/company_base.h
+++ b/src/company_base.h
@@ -92,7 +92,7 @@ struct CompanyProperties {
 	TileIndex last_build_coordinate; ///< Coordinate of the last build thing by this company.
 
 	TimerGameEconomy::Year inaugurated_year; ///< Economy year of starting the company.
-    TimerGameCalendar::Year inaugurated_year_calendar; ///< Calendar year of starting the company. Used for when we need to display an actual Inaguration Year while in Wallclock mode.
+    TimerGameCalendar::Year inaugurated_year_calendar; ///< Calendar year of starting the company. Used for when we need to display an actual Inauguration Year while in Wallclock mode.
 
 	uint8_t months_empty = 0; ///< NOSAVE: Number of months this company has not had a client in multiplayer.
 	uint8_t months_of_bankruptcy;       ///< Number of months that the company is unable to pay its debts
diff --git a/src/company_gui.cpp b/src/company_gui.cpp
index da3963e518..eb7cd358c1 100644
--- a/src/company_gui.cpp
+++ b/src/company_gui.cpp
@@ -2237,6 +2237,10 @@ struct CompanyWindow : Window
 			}
 		}
 
+        if (TimerGameEconomy::UsingWallclockUnits()) {
+            this->GetWidget<NWidgetLeaf>(WID_C_DESC_INAUGURATION)->SetDataTip(STR_COMPANY_VIEW_INAUGURATED_TITLE_WALLCLOCK, STR_NULL);
+        }
+
 		this->DrawWidgets();
 	}
 
@@ -2400,9 +2404,12 @@ struct CompanyWindow : Window
 				SetDParam(1, (CompanyID)this->window_number);
 				break;
 
-			case WID_C_DESC_INAUGURATION:
-                SetDParam(0, Company::Get((CompanyID) this->window_number)->inaugurated_year_calendar);
-                SetDParam(1, Company::Get((CompanyID) this->window_number)->inaugurated_year);
+            case WID_C_DESC_INAUGURATION:
+                if (TimerGameEconomy::UsingWallclockUnits()) {
+                    SetDParam(0, Company::Get((CompanyID) this->window_number)->inaugurated_year_calendar);
+                    SetDParam(1, Company::Get((CompanyID) this->window_number)->inaugurated_year);
+                }
+                else SetDParam(0, Company::Get((CompanyID) this->window_number)->inaugurated_year);
                 break;
 
 			case WID_C_DESC_COMPANY_VALUE:
diff --git a/src/lang/english.txt b/src/lang/english.txt
index b60b75c364..dcecf71d5e 100644
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -3889,7 +3889,8 @@ STR_FINANCES_INFRASTRUCTURE_BUTTON                              :{BLACK}Infrastr
 STR_COMPANY_VIEW_CAPTION                                        :{WHITE}{COMPANY} {BLACK}{COMPANY_NUM}
 STR_COMPANY_VIEW_PRESIDENT_MANAGER_TITLE                        :{WHITE}{PRESIDENT_NAME}{}{GOLD}(Manager)
 
-STR_COMPANY_VIEW_INAUGURATED_TITLE                              :{GOLD}Inaugurated: {WHITE}{NUM} (period {NUM})
+STR_COMPANY_VIEW_INAUGURATED_TITLE                              :{GOLD}Inaugurated: {WHITE}{NUM}
+STR_COMPANY_VIEW_INAUGURATED_TITLE_WALLCLOCK                    :{GOLD}Inaugurated: {WHITE}{NUM} (period {NUM})
 STR_COMPANY_VIEW_COLOUR_SCHEME_TITLE                            :{GOLD}Colour Scheme:
 STR_COMPANY_VIEW_VEHICLES_TITLE                                 :{GOLD}Vehicles:
 STR_COMPANY_VIEW_TRAINS                                         :{WHITE}{COMMA} train{P "" s}