I added a shift column in my database, which the transaction group logs to along with work data. That way I can use Ignition schedule management tool. I create a “user” for each shift, then run a timer script to check if they are currently scheduled or not, then write to a bool memory tag. It may seem a little hacky, but it has worked without fail for me.
Shift Work Schedules - Ignition - Inductive Automation Forum