https://www.gamespot.com/articles/last-chance-for-pokemon-gos-valentines-day-event-u/1100-6456760/

Update: Due to persistent server issues today, Niantic has extended the Pokemon Go Valentine's Day event until February 16, giving players an additional 24 hours to take advantage of the increased Luvdisc and Chansey spawns and earn extra Stardust.

The original story follows below.