guess it would have to be in the last few days, given you can't sue for something that hasn't happened yet, right? IANAL, so I don't know... up till last night, it was all speculation... when it was confirmed, they could sue then... maybe the paper work was in process, and finally filled when it happened...
> a lawsuit was filed in the US federal court in San Francisco seeking orders for Twitter to comply with the federal Worker Adjustment and Retraining Notification Act, which requires 60 days’ notice for mass sackings at large employers.