Careful!  This is not a postcard!  It’s a novelty tear-off calendar published by Valentine’s Novelty Calendars in Great Britain a long time ago, measuring 4.25″ x 6″ altogether.  We do not know what year it is because we have not removed this from the plastic bag we received it in.  So we make no guarantees about year or condition of the little calendar inside.  Google was no help at all.  The reverse is blank.