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Eruv Tavshilin

Eruv Tavshilin
When a holiday runs directly into Shabbat, an eruv tavshilin is set aside before the holiday. This allows us to prepare on the holiday for the Shabbat that follows.
What You Need to Know About Eruv Tavshilin
The Sages were concerned that unrestricted festival cooking might lead people to cook for an ordinary weekday as well.