According to the official Diablo twitter Diablo 3: Season 19 – Season of Eternal Conflict; ends on March 1st. It was bound to happen with the latest patch 2.6.8 being placed on the Public Test Realm. It’s usually been like a two week warning in the past when the PTR got updated. Now people will have time to finish their journeys and get ready for the new sets coming.
( ͡° ͜ʖ├┬┴┬┴ Season 19 ends March 1st. https://t.co/Z2aJzXb2Mp
— Diablo (@Diablo) February 14, 2020
Get those Seasonal Journeys done everyone so you can be ready to switch, and get ready for the next season coming up.