Citi double points on purchases made online using all Citibank Credit Cards and Debit Cards only today, April 10, 2018. That means, any Citibank Card you use, you get 2X of the usual points for your purchases today. On Accelerated Categories as well, it means double the points on your usual accelerated points as well.
All the extra points are going to be credited 15 days after the promotion is over. Here is a complete list of the T&C for this promotion.