Keeping track of time was extremely important in the life of most Jews during the lifetime of Jesus. The weekly Sabbath was meticulously observed by most Jews. In addition, annual festival days were holy celebrations falling on particular days in the month and year. The annual Jewish lunar calendar began in March, as did the Roman calendar (“Beware the Ides of March”). Passover, Pentecost, Day of Atonement (Yom Kippur), Tabernacles (Sukkot), Feast of Dedication (Hanukkah), and other holy days were Sabbath days for purposes of he law.
John P. Pratt, “Passover:Was It Symbolic of His Coming?” Ensign, January 1994, 38-45.
James C. Vanderkam, “Calendars,” ABD, 1:814-20.