Greetings Card Trojan Spam gets Timely Subject Morph

Looking at my spamtraps this evening, I see our "fake online greetings card" chums have switched from their previous boring subject lines to new ones, commemorating U.S. Independence Day.

The new subjects include:

4th Of July Celebration
America the Beautiful
America's 231st Birthday
Americas B-Day
Celebrate Your Independence
Dump tea in the harbor
Fourth of July Party
God Bless America
Happy 4th of July
Happy Birthday America
Happy Fourth of July
Independence Day At The Park
Independence Day Party
July 4th B-B-Q Party
July 4th Family Day
July 4th Fireworks Show
Your Nations Birthday [sic]

Update: my chums at Symantec calculate that they blocked 5.5 million of these during just five hours on July 3.

(In case you've been living under a rock, these messages include a link that tries to infect the victim with a Trojan.)