why did Ivan Denisovich have a "good day?"

Ivan recounts the "good day" he had,

"they hadn't put him in the cells; they hadn't sent his squad to the settlement; he'd swiped a bowl of kasha at dinner; the squad leader had fixed the rates well; he'd built a wall and enjoyed doing it; he'd smuggled that bit of hacksaw blade through; he'd earned a favor from Tsezar that evening; he'd bought that tobacco. And he hadn't fallen ill. He got over it."