That is also the cutoff date for the Dark Sky website and API, meaning other weather apps that use Dark Sky data will need to look at other services to populate their apps.
Shutting off the API is a real dick move. Apps like CARROT, which is a fantastic weather app, rely on that data.
Update: Looks like the API will stay active, but they’re no longer accepting new users. That’s fair. Also, a friend of mine speculated that this could eventually become WeatherKit, which I find highly intriguing.