diff --git a/ts/smarttime.classes.extendeddate.ts b/ts/smarttime.classes.extendeddate.ts
index 1e9624b..4a4818b 100644
--- a/ts/smarttime.classes.extendeddate.ts
+++ b/ts/smarttime.classes.extendeddate.ts
@@ -125,4 +125,8 @@ export class ExtendedDate extends Date {
   public format (formatArg: string) {
     return plugins.dayjs(this.getTime()).format(formatArg);
   }
+
+  public isToday () {
+    return plugins.dayjs(this.getTime()).isToday();
+  }
 }
diff --git a/ts/smarttime.plugins.ts b/ts/smarttime.plugins.ts
index e67ab30..75b8aa8 100644
--- a/ts/smarttime.plugins.ts
+++ b/ts/smarttime.plugins.ts
@@ -8,5 +8,8 @@ export { lik, smartdelay, smartpromise };
 // third parties
 import croner from 'croner';
 import dayjs from 'dayjs';
+import isToday from 'dayjs/plugin/isToday';
+
+dayjs.extend(isToday);
 
 export { croner, dayjs };