What do you consider the three "western" religions? None, of course started in the West; all originated in the Middle East. Do you include Judaism? Do you include Christianity or divide it into Protestants and Catholics? Id so, where are the Eastern Orthodox? Is Islam one of the three?
Whichever religions you are talking about, yes, they all observe holy days. Christmas and Easter for Christians for example, Passover and Yom Kippur for Jews, Ramadan for Muslims.
The Bible is the holy book for Jews (Old Testament) and Christians (New Testament) and the Koran is the holy book for Muslims.
Christmas..Easter..Passover
The Bible is the holy book for Jews (Old Testament) and Christians (New Testament) and the Koran is the holy book for Muslims.
They don't "need" holy days, they have them just like almost all religions but they are not strictly speaking necessary. Christians' holy days aren't necessary. What to you mean by "need"? as in why do they practice them or what is the point?
Three religions with holy sites in the eastern Mediterranean are Christianity (including sites like Jerusalem and Bethlehem), Judaism (with sites such as the Western Wall in Jerusalem), and Islam (with sites like the Dome of the Rock and Al-Aqsa Mosque in Jerusalem).
The holy city claimed by all three major monotheistic religions (Christianity, Judaism, and Islam) is Jerusalem. It is a city of significant religious importance and holds key sites such as the Western Wall, the Church of the Holy Sepulchre, and the Dome of the Rock.
Many religions celebrate Holy Days and most everyone celebrate Holidays.
The book of Exodus IS one of the Jewish holy texts. It does not "observe" holy texts.
Jerusalem is considered holy by all three religions.
Three religions have the same Holy City which is Jerusalem: Judaism, Christianism and Islam.
Most religions have holy sites, including the Christians, Jews, Muslims and Catholics.
World's Religions by Huston Smith is not extensive, but it is well done.