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The Christmas Fast in 2026 begins on November 15 and lasts for 40 days until December 24. During this period, Orthodox Christians prepare for the Nativity through fasting, prayer, and good deeds. There are 14 days with fish allowance, starting on November 21. The fast is less strict than Lent, allowing more days for fish, oil, and wine. The faithful abstain from animal products, focusing on plant-based meals, while also engaging in prayer and charitable acts. The fast culminates in stricter observance as Christmas approaches, emphasizing spiritual preparation for the Nativity.