I have a flight next week from Charleroi (always the prelude to a big mistake).

A national strike has been called on that day and no flights will operate from either Charleroi or Zaventem.

Ryanair have not yet cancelled my flight, so I cannot begin the rebooking process.

While I have on two different occasions been affected by wildcat strikes at CRL, never a pre-planned strike (to my memory). How far out do Ryanair cancel flights and therefore enable me to begin the rebooking process at their expense?

ETA: To answer my own question: it took about 5 days from announcement of the strike, they cancelled the flight this morning.