Well celebration of pagan holidays means partaking and commiting acts of these traditional and pagan rituals and doing things God didn't intend for us to be involved in. Any day is a great day to celebrate the Lord, and we must indeed center ourselves around The Word, I can't speak on Good Friday or Easter Sunday because anything that is accepted by the world like Easter Christmas Halloween and what not seemingly are rooted in pagan roots and are often misdirections from what we should be honoring. Thanks for your patience