TF = isequal (A, B) returns a logical scalar TF, which is true if the datetime arrays A and B are the same size and each pair of corresponding elements is the same point in time, and false otherwise. As with NaN, Not-A-Time (NaT) elements are never equal, so any NaT in either array makes the result false; use isequaln to treat NaT elements as equal.

Additional arrays may be supplied, as in isequal (A, B, C, …), in which case TF is true only when all of the arrays are equal to one another. Any input argument that is not a datetime array, or a datetime array whose time zone is not compatible with the others (one zoned and one unzoned), makes the result false rather than raising an error. Zoned arrays are compared by their absolute instants, so equal instants in different time zones are equal.

Source Code: datetime