Below is the quote from the link "https://en.m.wikipedia.org/wiki/Silicon_Valley_BART_extension" when this message is posted. It says March–September 2019. The $2.3-billion second phase, known as phase I of VTA's BART Extension or the Berryessa extension, consists of the Milpitas and Berryessa/North San Jose stations. Both are expected to open in March–September 2019.[3] The extension broke ground in 2012, originally scheduled for completion in 2016.[4]
The un-official date constantly changes, right now predicted for Winter 2019
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