diff --git a/xyz/openbmc_project/Time/Owner.interface.yaml b/xyz/openbmc_project/Time/Owner.interface.yaml
new file mode 100644
index 0000000..6794ce7
--- /dev/null
+++ b/xyz/openbmc_project/Time/Owner.interface.yaml
@@ -0,0 +1,26 @@
+description: >
+    Implement to set time owner.
+
+properties:
+    - name: TimeOwner
+      type: enum[self.Owners]
+      description: >
+          The time owner.
+
+enumerations:
+    - name: Owners
+      description: >
+        Possible owners of time.
+      values:
+        - name: BMC
+          description: >
+            BMC alone owns system time.
+        - name: Host
+          description: >
+            Host alone owns system time.
+        - name: Both
+          description: >
+            BMC and host own system time.
+        - name: Split
+          description: >
+            BMC and host maintain their own time.
diff --git a/xyz/openbmc_project/Time/Synchronization.interface.yaml b/xyz/openbmc_project/Time/Synchronization.interface.yaml
new file mode 100644
index 0000000..c63c55b
--- /dev/null
+++ b/xyz/openbmc_project/Time/Synchronization.interface.yaml
@@ -0,0 +1,20 @@
+description: >
+    Implement to set time synchronization method.
+
+properties:
+    - name: TimeSyncMethod
+      type: enum[self.Method]
+      description: >
+          The method of time synchronization.
+
+enumerations:
+    - name: Method
+      description: >
+        Possible methods of time synchronization.
+      values:
+        - name: NTP
+          description: >
+            Sync by using the Network Time Protocol.
+        - name: Manual
+          description: >
+            Sync time manually.