They should be available at the parks by March I would think.. However, they may only be the 2018 noted on them. I have a 2018 December college grad so I have to get some order soon for him.. Then I need them for my youngest son in 2019 from HS & mine in 2019 for my college degree...
You might be able to check etsy for someone who might make them.. Our kids have gotten them for each of their graduation HS and college... they love them!