There is no specific "holy day" of the week for Buddhists. There are a number of festivals. The ones I know of myself are (1) Buddhist New Year, (2) Vesak, which is the Buddha's birthday, (3) Bohdi Day, which is the day that the Buddha become enlightened. There are others also.
some of the holy days are matsuri, rei sai and more
holy and baskhi
High Holy Days - band - was created in 1998.
im not sure what you mean by holy. fridays are considered holy. the days of Ramadan are holy. the last ten days of Ramadan are considered VERY holy, as is the first ten days of the Islamic month dhul hijja. eid ul fitr and eid ul adha are also 'holy'. hope this answers ur question.
holy friday
holy mekkah and madina
No mistakes at all in the holy Quraan.
Days of Holy Obligation?
Sacred days were called feasts, feast days, or holy days. The term holiday came from holy day.
Probably is the bee ?
There are more than three Jewish holy days, but the answer you're looking for is Rosh Hashanah and Yom Kippur, which total three days. For more about these and the rest of the Jewish holy days and other occasions, see this linked page.
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?