In The Jungle, what do the bells that Jurgis hears remind him of?

In The Jungle, the bells remind Jurgis of joyful past Christmases.
Jurgis is in prison when he hears the bells. In chapter 16, we learn that Jurgis is in prison for beating up Connor, Ona's boss. Ona is Jurgis's wife. Jurgis had sought vengeance against Connor because he raped Ona and forced her into a secret life of prostitution.
Jurgis is initially pleased that he had managed to hurt Connor quite badly. However, the initial euphoria gives way to despair. With Jurgis in prison, Ona and the children will have no means of support. For his part, Jurgis begins to blame himself for allowing Ona to work at the factory in the first place. He worries about losing the house and about seeing his family turned out onto the streets.
Jurgis grieves for his family's future, and his thoughts trouble him. As midnight approaches, the church tower bells begin ringing incessantly. It suddenly dawns on Jurgis that it is Christmas Eve. Jurgis is then reminded of past Christmases, both during his childhood and now, in his adult years. In far-off Lithuania, he had celebrated Christmas in his childhood home. Now, in Packingtown, Jurgis remembers the Christmases he shared with Ona and their children.
Even though he and Ona worked the previous Christmas holiday, they had found strength to take their children for a "walk upon the avenue" after the grueling work day. Jurgis remembers what the store windows had looked like and what foods the family had enjoyed in celebration.

In one window there would be live geese, in another marvels in sugar—pink and white canes big enough for ogres, and cakes with cherubs upon them; in a third there would be rows of fat yellow turkeys, decorated with rosettes, and rabbits and squirrels hanging; in a fourth would be a fairyland of toys—lovely dolls with pink dresses, and woolly sheep and drums and soldier hats. Nor did they have to go without their share of all this, either. The last time they had had a big basket with them . . . —a roast of pork and a cabbage and some rye bread . . .

So, the bells remind Jurgis of past joyful Christmases. The memories are all the more painful because he is in prison.