Nikon D3300 - Manual (Page 217)

197 Playback and Deletion
3
Select the highlighted
date.
Press
2 to select all pictures
taken on the highlighted
date. Selected dates are
indicated by check marks.
Repeat steps 2 and 3 to
select additional dates; to deselect a date, highlight it and
press
2.
4
Press J to complete the
operation.
A confirmation dialog will
be displayed; highlight Yes
and press
J.