This article is from the Dissociation FAQ, by Discord (email@example.com) with numerous contributions by others.
Despite what the DSM publishes, many multiples do not lose time, or only
some of their alters do. Often, it is only the alters who are out the
least often who miss periods of time. Particularly in the case of
integrated/co-conscious multiples, even alters who do not experience a
particular act as their own can be in some way made aware of the passage
of time and the actions during that time.