Drake: I Know When That Birthday Bling!!!

Drake's putting a new twist on the ole classic Jesus piece ... with his new "6 God" ice.

Drizzy turned up for his 29th birthday Saturday at Omnia Nightclub in Las Vegas, and one of his gifts was a diamond and gold chain from his fave jewelers ... Dave Bling and Will Da Boss of DWS Jewelry & Co.

Dave and Will tell us the pendant -- two hands clasped in prayer next to a 6 -- was inspired by Drake's song "6 God" off the album, "If You're Reading This It's Too Late." And even though it's not huge in size, it's worth a sweet $15k!

Even in October ... still so hot up in the 6.