Great Book Sales at Bra Basah Complex

There was a great book sales today at the Bra Basah Complex, which is right beside the National Libary. Great deals on many books there. I got some books there for a dollar a piece.
Follow this link to see where Bra Basah Complex is: http://wikimapia.org/21117/Bras-Basah-Complex
And I forgot to ask when the last day this sales is!
Anybody know?