From GameWatcher: “The Overwatch Lunar New Year event is returning in 2019 as well, Blizzard has announced. Celebrating the Year of the Pig, the event kicks off next week, on January 24, lasting until February 18.
As a new event means new skins are on the way, the Overwatch social channels will reveal one new skin per day between January 19 and January 24.”
Source: N4G PC Overwatch's Lunar New Year Event Returns Next Week