It is important to know what the biblical Holy Days are, what the Bible says about them, if they were discontinued, or should still be observed, and when they are celebrated. Some religions continue to celebrate all of the Holy Days while others point out that when Jesus Christ died on the Cross and the temple curtains were torn that there were no further need for physical sacrifices to God because Jesus is the ultimate sacrifice for our sins and become this when He was crucified. This bible study will show which biblical Holy Days are still supposed to be celebrated to day and which one's we need not observe but should keep in remembrance as part of biblical historical facts. Keep in mind that there were no further need for blood sacrifices but many Holy days were ordered to be observed forever, by God. These orders were not abolished. The Holy Days are still to be observed, However, those Holy days that required blood sacrifice and blood sacrifice of birds and animals no longer need a blood sacrifice during the ceremony because Jesus Christ was the ultimate blood sacrifice for the sins of everyone.