135 Avodah Zarah 1/1-4

(1) During the three days preceding the festivals of the non-Jews, it is forbidden to do business with them, to lend them something or to borrow something from them, to lend [money] to them or to borrow [money] from them, to resolve your debt to them or to have them resolve their debt to you. Rabbi Yehuda says: One can have them resolve their debt since it causes him distress. They [the Sages] said to him: even though he might be in distress at the outset, eventually he will be joyful.

(2) Rabbi Yishmael says: [the above] is forbidden for three days before the festivals and three days after the festivals. The Sages say: before the festivals it is forbidden, after the festivals it is permitted.

(3) And these, according to Rabbi Meir, are the festivals of the non-Jews: Kalendae, Saturnalia, Kratesim, kings' days of accession, the day of birth, and the day of death. And the Sages say: every funeral in which a conflagration is present [thereby] involves idol worship. One that has no conflagration does not involve idol worship. [A celebration of] the day on which a [non-Jewish] man cuts his beard or his hair, the day that he came ashore from the sea, and the day he was released from prison, and a pagan who made a feast for his son, [for all these] the prohibition extends only to that day and that man alone.

(4) It is permitted [to do business, etc.] outside of a city that has idolatry within it. If there is idolatry outside the city, it is permitted [to do business, etc.] within the city. Is one permitted to travel to such a place [on the days of their festivals]? If road leads to this place alone, it is forbidden; but if one can walk along this road to another location, it is permitted. Regarding a city which has idolatry within it, and has both ornamented and un-ornamented shop fronts, this was the case in Beit Sh'an, and [there] the Sages said: The ornamented shops are forbidden and those shops without ornamentation are permitted.