Choose the correct option. Shrovetide lasts for a ____. Shrovetide is an ancient Russian holiday which dates back to the 9th century. It begins a week before Shrove Monday, which is the last Monday before the 40-day fasting period of Lent. Shrovetide is the most cheerful of all Russian holidays. Not to participate in this holiday means to live in poverty for the rest of the year. Each day of Shrovetide has its own rituals.