In a media release, Oracle said that it expected unconditional approval from China and Russia and intended to close the transaction soon.
The company said it would host a full-day event for customers, partners, press and analysts on January 27 at 9am (4am AEST, Jan 28) at its headquarters in Redwood Shores, California.
The media release said Oracle chief Larry Ellison and executives from Oracle and Sun would outline strategy, product roadmaps, and explain how customers would benefit from having all components - hardware, operating system, database, middleware, and applications - engineered to work together. The event will be broadcast globally.
January 27 was set down last month as the final legal deadline for an EU decision on the deal.
EU competition commissioner Neelie Kroes said in a statement: "I am now satisfied that competition and innovation will be preserved on all the markets concerned.
"Oracle's acquisition of Sun has the potential to revitalise important assets and create new and innovative products."