The phrasing of your question is ambiguous, so it is open to interpretation. I cannot be sure what you mean by the 'moment of change' or by 'numerically identical with'. However, in modern physics there is a difference between an event, or a change, and the time at which it occurs. A change may have several attributes, for example it will generally have a spatial location, whereas the time at which it occurs is just one coordinate labelling the position of the change.
In an everyday sense, most changes are not instantaneous (although you can break down a change into parts of increasingly shorter duration), so you cannot sensibly associate them with a single instant of time in any event.
The numerical value of the time at which a change occurs is in any case entirely arbitrary. For example, you might consider an event to have happened at noon, while someone in another time zone might say it happened at one O'clock, and both those times are simply conventions- there is no absolute numerical value associated with a point in time.
Asking if a change is numerically identical with the point of time at which it occurred is rather like asking if it is numerically identical with the distance at which it occurred, measured from some arbitrary origin.