question about nuns

I have some business to do with Catholic nursing homes and convents. I know they won't be doing business today, because it's Good Friday. Still, they are likely to have somebody THERE. (People live there all the time.) It would make my life easier to call today and make appointments for Monday or Tuesday. If it's likely to offend them, I can wait and call Monday morning. Any thoughts? I know almost nothing about these things.