They're already 2/3rds the way through Spring 2018 in the US, and a ref to Winter 2018 would be very odd given the US starts seasons on the 22nd of Mar, Jun, Sep and Dec, so Winter 2018 was Dec 22, 2017 to Mar 22, 2018. Their next Winter is Winter 2019 (Dec 22, 2018 to Mar 22, 2019). I'd say...