The TLS 1.1 requirement is currently June 2018, however that has been delayed many times.
As it should be, because:
"Customers not being able to access online banking because the bank stubbornly insists on strong crypto is a far bigger concern than the crypto being broken," Grooten said. "And rightly so."
I'm not involved with banking, but do manage various eticketing and retail solutions. If we were to turn off TLS1.1, we would lose up to 40% of our customer base.
That's potentially 40% less revenue.
No sensible business can afford to do that.