[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [serverTimestamp](./firestore_lite.servertimestamp.md) ## serverTimestamp() function Returns a sentinel used with [setDoc()](./firestore_lite.setdoc.md) or [updateDoc()](./firestore_lite.updatedoc.md) to include a server-generated timestamp in the written data. Signature: ```typescript export declare function serverTimestamp(): FieldValue; ``` Returns: [FieldValue](./firestore_lite.fieldvalue.md)