Data mirror invalid timestamped write handling

For handling data mirror invalid timestamped write activities, an apparatus is disclosed. The apparatus includes a data mirror that mirrors write activities from a first storage device at a first site to a second storage device at a second site. The apparatus includes a time monitor that retrieves a timestamp for each of the mirrored write activities and monitors a reference clock in a storage control session as a comparison to validate the timestamp for each of the mirrored write activities. If the timestamp of a mirrored write activity is outside of a pre-determined parameter range, then the time monitor identifies the mirrored write activity as having a missing timestamp, assigns a next logical timestamp to the mirrored write activity, and prepares the mirrored write activity for inclusion in a consistency group associated with the next logical timestamp.