The antonyms for "calling day" can vary depending on the context of the phrase. If "calling day" refers to a day when people make phone calls or visits, the antonyms could be "rest day," "quiet day," or "day off." If "calling day" refers to a day of great importance or urgency, the antonyms could be "average day," "ordinary day," or "unimportant day." Alternatively, if "calling day" refers to a religious day of observance or celebration, the antonyms may be "non-religious day," "secular day," or "irreligious day." Overall, the antonyms for "calling day" depend on the meaning and usage of the phrase in a particular context.