A lockable storage assembly, or lockbox container, is disclosed, with programmable opening utility, for providing access to the contents of the storage assembly at a time chosen by a user to suit an occasion. The lockbox includes non-volatile memory for holding current time and date, and opening time and date, and is assembled of integrated circuits and display, requiring very low power, such that the lockbox may retain function over extended periods of time, while locking mechanisms with higher power requirements are powered by a replaceable, externally accessible battery. The lockbox is assembled and programmed so that the interior is accessible only upon reaching a match date, whereupon the lockbox unlocks automatically, or upon entry of a password chosen by the user.