diff --git a/.changeset/docs-native-session-deadlines.md b/.changeset/docs-native-session-deadlines.md
new file mode 100644
index 00000000000..a845151cc84
--- /dev/null
+++ b/.changeset/docs-native-session-deadlines.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/packages/backend/src/api/resources/Session.ts b/packages/backend/src/api/resources/Session.ts
index 968be156748..cb52f230154 100644
--- a/packages/backend/src/api/resources/Session.ts
+++ b/packages/backend/src/api/resources/Session.ts
@@ -52,9 +52,13 @@ export class Session {
     readonly status: string,
     /** The time the session was last active on the [`Client`](https://clerk.com/docs/reference/backend/types/backend-client). */
     readonly lastActiveAt: number,
-    /** The Unix timestamp when the `Session` will expire. */
+    /**
+     * The Unix timestamp when the `Session` will expire. For an [indefinite native session](https://clerk.com/docs/guides/secure/session-options#native-sessions), this is `0`, meaning no expiration deadline. Check `status` to determine whether the session is active.
+     */
     readonly expireAt: number,
-    /** The Unix timestamp when the `Session` will be abandoned. */
+    /**
+     * The Unix timestamp when the `Session` will be abandoned. For an [indefinite native session](https://clerk.com/docs/guides/secure/session-options#native-sessions), this is `0`, meaning no abandonment deadline.
+     */
     readonly abandonAt: number,
     /** The Unix timestamp when the `Session` was first created. */
     readonly createdAt: number,
diff --git a/packages/shared/src/types/session.ts b/packages/shared/src/types/session.ts
index d37719cc20f..f65c1191a1d 100644
--- a/packages/shared/src/types/session.ts
+++ b/packages/shared/src/types/session.ts
@@ -221,7 +221,7 @@ export interface SessionResource extends ClerkResource {
    */
   status: SessionStatus;
   /**
-   * The date and time when the session will expire. Unix epoch zero means no maximum lifetime.
+   * The date and time when the session will expire. For an [indefinite native session](https://clerk.com/docs/guides/secure/session-options#native-sessions), this represents Unix epoch zero, meaning no expiration deadline is configured.
    */
   expireAt: Date;
   /**
@@ -229,7 +229,7 @@ export interface SessionResource extends ClerkResource {
    */
   readonly hasMaximumLifetime?: boolean;
   /**
-   * The abandonment deadline. Unix epoch zero means no abandonment deadline.
+   * The abandonment deadline. For an [indefinite native session](https://clerk.com/docs/guides/secure/session-options#native-sessions), this represents Unix epoch zero, meaning no abandonment deadline is configured.
    */
   abandonAt: Date;
   /**