All Jewish Holidays with Sabbath-like restrictions require that all normal business, school or secular activities cease about two hours before sundown on the eve of the Holiday to allow for adequate preparations.
Actual Holiday restrictions go into effect approximately half an hour before sundown on the eve of the Holiday. Some of the restricted activities include all forms of vehicular travel, writing, direct use of electrical devices, measurements and any preparations for, or discussion of, normal weekday activities or responsibilities.
Some activities, such as cooking and carrying, that are forbidden on the Sabbath and Yom Kippur, are permitted on the other holidays.
Restrictions end approximately one hour after sundown of the last day. No travel or restricted activities are permitted until then.
Holiday restrictions cannot be relaxed except in circumstances when there is mortal danger to a human life.
Fast days include special prayers and extended synagogue services both in the morning and afternoon. Both food and water are forbidden until approximately one hour after sunset.
Except for Yom Kippur, Jewish fast days are not observed on the Sabbath and their dates of observance are altered accordingly as indicated on the linked calendar.