That would all depend on whether it was one of your legal days off. Contractually, we are required to have days off at base, not down route. The new freighter contract breaks this norm.
If it was not one of the legal days off, they can of course change it. If they didn't have this flexibility the Company would cover its arse and give us only the legal number each month replacing the extras with AD's and STBY duties. That would be a blow to all those 380 boys and girls with their 15-16 OFF each month.
In fairness to EK, being asked to work over days off is rare anyway.
Harry