Since the first century C.E., the most prevalent and popular view for the observance of Passover and the seven days of Unleavened Bread has been Hasidic System B—an interpretation first expressed by the ancient Hasidim.
This practice has the Passover sacrifice offered during during the afternoon of Abib 14 with the Passover meal eaten at the beginning of Abib 15. All leavening is removed from one’s home by noon on Abib 14. Abib 15 begins the 7-day Feast of Unleavened Bread and continues through Abib 21. There is a total of 8 days of Unleavened Bread counted from Abib 14-21.
The questions that must be asked are:
• What is the ancient evidence of this interpretation? Also, just how and on what days did they keep the Festival of Passover and Unleavened Bread?
• When did this Hasidic view of Passover and the seven days of Unleavened Bread first appear?
• What issues created their interpretation and how did they derive their understanding of בערב (be-arab; in the mixing of light and dark [twilight]) and its cognate term בין הערבים (byn ha-arabim; between/among the mixings of light and dark [twilight])?