Shulchan Arukh Orach Chayim · Siman 393

Shulchan Arukh Orach Chayim 393 — English translation

Translation: Sefaria Community Translation. Section numbers match the Hebrew text above.

1. 1One does not make eruv chatzeirot (courtyard eruv) or shitufei mevoot (alleyway partnership) on a festival that falls on Friday. But if one forgot and did not make an eruv before the festival, and two festival days fall on Thursday and Friday, one may make an eruv on the festival conditionally, saying: "If today is a weekday, let this be an eruv; if today is holy, my words are nothing." And the next day one says: "If today is holy, I already made an eruv yesterday; if today is a weekday, let this be an eruv." This applies to the two festival days observed in the diaspora, but not to the two days of Rosh Hashanah, for they are considered like one long day. (See below, section 528.)
2. 2Both eruv chatzeirot and shitufei mevoot may be established during twilight, even if one has already accepted the addition to Shabbat. Some authorities forbid this if one has already accepted the addition to Shabbat.
3. 3If one made an eruv for two people—for one person while it was still day and that eruv was consumed during twilight, and for another person during twilight—both have acquired their eruv. For the one whose eruv was consumed during twilight, we consider it night; for the one whose eruv was placed during twilight, we consider it day. However, if one made an eruv during twilight and it was consumed during twilight, it is forbidden.

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