A time stamp of a message from a sending mobile device may be modified to correlate with the time zone occupied by a recipient mobile device. A message from a sending mobile device may be received at a message center. The message center may then route the message to a switch that manages the recipient mobile device, in which the switch is in a time zone that is different from the time zone occupied by the recipient mobile device. Accordingly, the switch may update a time stamp of the message to correlate with the time zone occupied by the recipient mobile. Following the update, the switch may transfer the message with the updated time stamp to the recipient mobile device.