Why do you say they are jewish festivals? Leviticus 23:2 reads: Speak to the children of Israel and say to them: The feasts of the LORD, which you shall proclaim to be holy convocations, these are MY feasts.
So these feasts are gods feasts for starters and that's what I told two joho's when they came to my door. That we were to keep the feasts forever. It shall be a statute forever in all our dwellings throughout our generations(verse 21).
Acts 18:21 shows Paul having to travel to Jerusalem to keep the feast. Paul also stated for us to keep the feast in 1Corinthians 5:8: Therefore let us keep the feast, not with old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.
Ask the jw's if their bible has a cross reference scripture to 1 Corinthians 5:8 and it will show them Exodus 12:15. (That's if they tell you the law was done away with). The feasts were part of the law. They will say the law is done away with yet Matthew 5:17,18 says until heaven and earth passes away, not one jot or one tittle will by no means pass from the law till all is fulfilled. Heaven and earth hasn't passed away yet. The CO and his wife told us they weren't familiar with this scripture. They had just come back from gilead. You can show tons of scriptures on the law and they still will not listen. It just goes on and on in a circle with these people.