Contradiction with Colossians 2:16-17
These verses suggest that festivals, such as the feast in Leviticus 23:36, are a shadow of things to come and not obligatory for Christians.
Colossians 2:16-17: Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath [days]: [in meat...: or, for eating and drinking] [respect: or, part]
Contradiction with Romans 14:5-6
These verses highlight the idea that regard for religious days is a personal conviction, which could contradict the mandatory observance described in Leviticus 23:36.
Romans 14:5-6: One man esteemeth one day above another: another esteemeth every day [alike]. Let every man be fully persuaded in his own mind. [fully persuaded: or, fully assured]
Contradiction with Galatians 4:9-10
These verses criticize the observance of special days and months, potentially conflicting with the festival command in Leviticus 23:36.
Galatians 4:9-10: But now, after that ye have known God, or rather are known of God, how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage? [turn ye again: or, turn ye back] [elements: or, rudiments]