Seasonal jobs that might turn permanent - what worked for you?

A staffing agency says some roles convert to permanent after 12 weeks. I have read a lot of threads here and could not find my exact situation. Hours ramp up in the coming weeks.

Keep a list of supervisors' names. A reference from one of them helped me land my next job.

I was converted after one season because I showed up every day and volunteered for extra shifts. Managers remember that.