Greeting cards are quite literally an acknowledgement of a special occasion.
In a dream, playing cards highlight our ability to be open to opportunity or to take chances.
The cards that one deals, or is dealt, in a dream may have significance as to number or suit: hearts indicate emotion and relationship. Diamonds represent material wealth.
Spades represent conflict, difficulties and obstacles. Clubs represent action, work and intelligence.
The king portrays human success and mastery.
The queen indicates emotional depth, sensitivity and understanding whereas the jack represents impetuosity, creativity or an adolescent energy.