Commerce is suspended on the following days: the three holy days of the Festival of Ridvan, Naw Ruz, Birth of the Bab, Declaration of the Bab, Martyrdom of the Bab, Birth of Baha’u’llah, and Ascension of Baha’u’llah. The nearest Sunday to each of the five main festivals is a no-work day. Differing Buddhist traditions may use alternative days from those shown here. Good Friday, Easter Sunday and Christmas Day are no-work days. Sunday is the most important day for worship; acts of worship can also take place on other days of the week. Hindus celebrate many varied festivals and may or may not make the following no-work days: Janmashtami, Diwali and Hindu New Year. Believers are expected to observe sacred days of Eid al Fitr and Eid al Adha. Friday is the day for services of prayer and instruction — usually at about noon. The beginning of each Islamic month is subject to confirmation of successful sighting of the new moon. No work is to be done on the Shabbat, which begins at dusk on Friday and ends after dark on Saturday, or on major holidays, which begin at dusk the evening before and end after dark on the day. The major holidays are the first two and last two days of Pesach, Shavuot, Rosh Hashanah, Yom Kippur, the first two days of Sukkot, Shemini Atzeret, and Simchat Torah. There are no specific no-work days, but most Sikhs will take a day off on the birthday of Guru Nanak. Most Zoroastrians would make the following a no work day: Jamsheedi NoRuz, Shahenshai Navroze and some Zoroastrians would also take time off for Muktads.