What is Rembrandts birthday?

Rembrandt's birthday is July 15th.

"Rembrandt was born on July 15, 1606"

ThinkExist: Birthday July 15
http://en.thinkexist.com/birthday/July_15/

"Rembrandt Harmenszoon van Rijn was born on July 15, 1606, in Leiden,
the Netherlands."

WebMuseum: Rembrandt
http://www.ibiblio.org/wm/paint/auth/rembrandt/ 

"On July 15, 1606 - Rembrandt is born in Leyden, Netherlands."

Like Television: This Day in History
http://tesla.liketelevision.com/liketelevision/tuner.php?channel=197&format=tv&theme=history

Google search strategy:

Google Web Search: rembrandt born
://www.google.com/search?hl=en&q=rembrandt+born

I hope this is helpful. If anything is unclear or incomplete, please
request clarification; I'll be glad to offer further assistance before
you rate my answer.

Best regards,
pinkfreud

I see you found his birthday there are many artists paying tribute to
him nowdays; take a look at the environmental landscape project of the
Finnish Dutch sculptor den Arend
-http://www.denarend.com/works/environmental/trajectory_rembrandt/index.htm