And in everything one needs to make ‘an addition’ on the Sabbath, for if he was accustomed to eating bread and wine on weekdays, then he should add meat on the Sabbath – this is the ‘addition (tosephet) of Sabbath’.
Changing one’s actions: for if he was accustomed to performing a certain act on weekdays, he should not do it on the Sabbath, it is this that is written: (Ex. 20:9) Six days you shall work... etc.
Changing name: each day is called a day of ‘action’ (ma)’aseh, as it says: (Ez. 46:1)... six working days... and the seventh day is called ‘Sabbath’ – which is the cessation of action, the cancellation of work.