Fasting in the Hebrew Bible that occurred in the midst of Independence Day

In the year that we fast in the Hebrew Bible after Pesach, but it turns out that 1 of the days of Lent falls in the midst of Independence Day, what is the ruling?
Skip 1 of the fasting days?
Should we even postpone the fasting order until next week?
(Based on the assumption that a good day is one of praise, eating and drinking, singing and chanting, and not fasting, repentance and forgiveness)