diff --git a/docs/src/main/asciidoc/scheduler-reference.adoc b/docs/src/main/asciidoc/scheduler-reference.adoc
index 134e3bef9407a..b2374725ae3a1 100644
--- a/docs/src/main/asciidoc/scheduler-reference.adoc
+++ b/docs/src/main/asciidoc/scheduler-reference.adoc
@@ -164,7 +164,7 @@ void myMethod() { }
 
 An interval trigger defines a period between invocations.
 The period expression is based on the ISO-8601 duration format `PnDTnHnMn.nS` and the value of `@Scheduled#every()` is parsed with `java.time.Duration#parse(CharSequence)`.
-However, if an expression starts with a digit then the `PT` prefix is added automatically.
+However, if an expression starts with a digit and ends with `d`, `P` prefix will be added automatically. If the expression only starts with a digit, `PT` prefix is added automatically.
 So for example, `15m` can be used instead of `PT15M` and is parsed as "15 minutes".
 
 .Interval Trigger Example
@@ -237,7 +237,7 @@ NOTE: The final value is always rounded to full second.
 
 `@Scheduled#delayed()` is a text alternative to the properties above.
 The period expression is based on the ISO-8601 duration format `PnDTnHnMn.nS` and the value is parsed with `java.time.Duration#parse(CharSequence)`.
-However, if an expression starts with a digit, the `PT` prefix is added automatically.
+However, if an expression starts with a digit and ends with `d`, `P` prefix will be added automatically. If the expression only starts with a digit, `PT` prefix is added automatically.
 So for example, `15s` can be used instead of `PT15S` and is parsed as "15 seconds".
 
 [source,java]
diff --git a/extensions/scheduler/api/src/main/java/io/quarkus/scheduler/Scheduled.java b/extensions/scheduler/api/src/main/java/io/quarkus/scheduler/Scheduled.java
index 0353c8c401bbe..e13e64c127ae2 100644
--- a/extensions/scheduler/api/src/main/java/io/quarkus/scheduler/Scheduled.java
+++ b/extensions/scheduler/api/src/main/java/io/quarkus/scheduler/Scheduled.java
@@ -95,7 +95,8 @@
     /**
      * Defines the period between invocations.
      * <p>
-     * The value is parsed with {@link Duration#parse(CharSequence)}. However, if an expression starts with a digit, "PT" prefix
+     * The value is parsed with {@link Duration#parse(CharSequence)}. However, if an expression starts with a digit and ends
+     * with 'd', "P" prefix will be added automatically. If the expression only starts with a digit, "PT" prefix
      * is added automatically, so for example, {@code 15m} can be used instead of {@code PT15M} and is parsed as "15 minutes".
      * Note that the absolute value of the value is always used.
      * <p>
@@ -135,7 +136,8 @@
      * Defines a period after which the trigger should start. It's an alternative to {@link #delay()}. If {@link #delay()} is
      * set to a value greater than zero the value of {@link #delayed()} is ignored.
      * <p>
-     * The value is parsed with {@link Duration#parse(CharSequence)}. However, if an expression starts with a digit, "PT" prefix
+     * The value is parsed with {@link Duration#parse(CharSequence)}. However, if an expression starts with a digit and ends
+     * with 'd', "P" prefix will be added automatically. If the expression only starts with a digit, "PT" prefix
      * is added automatically, so for example, {@code 15s} can be used instead of {@code PT15S} and is parsed as "15 seconds".
      * Note that the absolute value of the value is always used.
      * <p>
@@ -171,7 +173,8 @@
     /**
      * Defines a period after which the job is considered overdue.
      * <p>
-     * The value is parsed with {@link Duration#parse(CharSequence)}. However, if an expression starts with a digit, "PT" prefix
+     * The value is parsed with {@link Duration#parse(CharSequence)}. HHowever, if an expression starts with a digit and ends
+     * with 'd', "P" prefix will be added automatically. If the expression only starts with a digit, "PT" prefix
      * is added automatically, so for example, {@code 15m} can be used instead of {@code PT15M} and is parsed as "15 minutes".
      * Note that the absolute value of the value is always used.
      * <p>
diff --git a/extensions/scheduler/common/src/main/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtils.java b/extensions/scheduler/common/src/main/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtils.java
index 9b6181c1c4970..39de16105895c 100644
--- a/extensions/scheduler/common/src/main/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtils.java
+++ b/extensions/scheduler/common/src/main/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtils.java
@@ -175,7 +175,11 @@ private static long parseDurationAsMillis(Scheduled scheduled, String value, Str
 
     private static Duration parseDuration(Scheduled scheduled, String value, String memberName) {
         if (Character.isDigit(value.charAt(0))) {
-            value = "PT" + value;
+            if (Character.toLowerCase(value.charAt(value.length() - 1)) == 'd') {
+                value = "P" + value;
+            } else {
+                value = "PT" + value;
+            }
         }
 
         try {
diff --git a/extensions/scheduler/common/src/test/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtilsTest.java b/extensions/scheduler/common/src/test/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtilsTest.java
index a88b726cc3f58..09083fce197d2 100644
--- a/extensions/scheduler/common/src/test/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtilsTest.java
+++ b/extensions/scheduler/common/src/test/java/io/quarkus/scheduler/common/runtime/util/SchedulerUtilsTest.java
@@ -1,8 +1,13 @@
 package io.quarkus.scheduler.common.runtime.util;
 
+import java.lang.annotation.Annotation;
+import java.util.concurrent.TimeUnit;
+
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import io.quarkus.scheduler.Scheduled;
+
 public class SchedulerUtilsTest {
 
     @Test
@@ -62,4 +67,73 @@ void testDefaultValueNestedJBossStyle() {
         Assertions.assertEquals("MY_DEFAULT_VALUE",
                 SchedulerUtils.lookUpPropertyValue("${non.existing.property1:${non.existing.property2:MY_DEFAULT_VALUE}}"));
     }
+
+    @Test
+    void testParseDurationPeriodString() {
+        Assertions.assertEquals(24 * 60 * 60 * 1000, SchedulerUtils.parseDelayedAsMillis(createScheduledDelayed("P1D")));
+    }
+
+    @Test
+    void testParseDurationPeriod() {
+        Assertions.assertEquals(24 * 60 * 60 * 1000, SchedulerUtils.parseDelayedAsMillis(createScheduledDelayed("1d")));
+    }
+
+    @Test
+    void testParseDurationPeriodOfTimeString() {
+        Assertions.assertEquals(2 * 60 * 60 * 1000, SchedulerUtils.parseDelayedAsMillis(createScheduledDelayed("PT2H")));
+    }
+
+    @Test
+    void testParseDurationPeriodOfTime() {
+        Assertions.assertEquals(2 * 60 * 60 * 1000, SchedulerUtils.parseDelayedAsMillis(createScheduledDelayed("2h")));
+    }
+
+    private Scheduled createScheduledDelayed(String delayed) {
+        return new Scheduled() {
+
+            public Class<? extends Annotation> annotationType() {
+                return null;
+            }
+
+            public long delay() {
+                return 0;
+            }
+
+            public TimeUnit delayUnit() {
+                return TimeUnit.MINUTES;
+            }
+
+            public ConcurrentExecution concurrentExecution() {
+                return ConcurrentExecution.PROCEED;
+            }
+
+            public String timeZone() {
+                return Scheduled.DEFAULT_TIMEZONE;
+            }
+
+            public String identity() {
+                return "";
+            }
+
+            public String every() {
+                return "";
+            }
+
+            public String cron() {
+                return "";
+            }
+
+            public String overdueGracePeriod() {
+                return "";
+            }
+
+            public Class<? extends SkipPredicate> skipExecutionIf() {
+                return Never.class;
+            }
+
+            public String delayed() {
+                return delayed;
+            }
+        };
+    }
 }