diff --git a/src/components/ha-relative-time.ts b/src/components/ha-relative-time.ts
index 1bd6e39afc..a2f9e403ca 100644
--- a/src/components/ha-relative-time.ts
+++ b/src/components/ha-relative-time.ts
@@ -13,7 +13,7 @@ import type { HomeAssistant } from "../types";
 class HaRelativeTime extends UpdatingElement {
   @property({ attribute: false }) public hass!: HomeAssistant;
 
-  @property({ attribute: false }) public datetime?: string;
+  @property({ attribute: false }) public datetime?: string | Date;
 
   private _interval?: number;
 
diff --git a/src/dialogs/more-info/controls/more-info-sun.ts b/src/dialogs/more-info/controls/more-info-sun.ts
index 80fa678ee4..c5e26348e7 100644
--- a/src/dialogs/more-info/controls/more-info-sun.ts
+++ b/src/dialogs/more-info/controls/more-info-sun.ts
@@ -44,7 +44,7 @@ class MoreInfoSun extends LitElement {
               >
               <ha-relative-time
                 .hass=${this.hass}
-                .datetimeObj=${item === "ris" ? risingDate : settingDate}
+                .datetime=${item === "ris" ? risingDate : settingDate}
               ></ha-relative-time>
             </div>
             <div class="value">
diff --git a/src/panels/config/tags/ha-config-tags.ts b/src/panels/config/tags/ha-config-tags.ts
index 50c971eb10..713b14d72a 100644
--- a/src/panels/config/tags/ha-config-tags.ts
+++ b/src/panels/config/tags/ha-config-tags.ts
@@ -84,7 +84,7 @@ export class HaConfigTags extends SubscribeMixin(LitElement) {
                 ${tag.last_scanned_datetime
                   ? html`<ha-relative-time
                       .hass=${this.hass}
-                      .datetimeObj=${tag.last_scanned_datetime}
+                      .datetime=${tag.last_scanned_datetime}
                     ></ha-relative-time>`
                   : this.hass.localize("ui.panel.config.tags.never_scanned")}
               </div>`
@@ -103,7 +103,7 @@ export class HaConfigTags extends SubscribeMixin(LitElement) {
             ${last_scanned_datetime
               ? html`<ha-relative-time
                   .hass=${this.hass}
-                  .datetimeObj=${last_scanned_datetime}
+                  .datetime=${last_scanned_datetime}
                 ></ha-relative-time>`
               : this.hass.localize("ui.panel.config.tags.never_scanned")}
           `,