Yom Kippur is a fast with the five inuyim and a day on which melacha is forbidden. That includes the melacha of hotzaah. The prohibition against carrying therefore applies on Yom Kippur even when it falls on a weekday.

In Crown Heights, the practical ruling is explicit. There is no accepted eruv on which to rely, and the Crown Heights Rabbonim have repeatedly included Yom Kippur when prohibiting carrying in the neighborhood streets.

Hotzaah applies on Yom Kippur

The Alter Rebbe states the rule directly in Shulchan Aruch, Orach Chayim 611:4: all of the Shabbos prohibitions of hotzaah apply on Yom Kippur as well. In practical terms, the same basic issues of transferring an object from one halachic domain to another and carrying through a public domain remain relevant throughout Yom Kippur.

This is different from an ordinary Yom Tov. The Crown Heights Beis Din made that distinction especially clear in its Tishrei visitor guidance: Crown Heights has no eruv, carrying is forbidden on Shabbos and Yom Kippur, while Yom Tov has its own laws permitting carrying in circumstances of genuine Yom Tov need.

The full mechanics of hotzaah, the halachic domains, and carrying four amos are explained on the hotzaah and domains page. For Yom Kippur, the immediate point is simple: a weekday date does not turn the streets into a place where ordinary carrying is permitted.

The Crown Heights rulings expressly name Yom Kippur

In Sivan 5776, Rabbi Avrohom Osdoba and Rabbi Shlomo Yehuda Halevi Segal issued a joint notice to Crown Heights residents and guests. Its English free translation states:

In this community there is no kosher eruv. It is therefore forbidden for anyone to carry outdoors, both on Shabbos and Yom Kippur as the Torah instructs.

The Hebrew text is more specific about the form of carrying. It says that because there is no kosher eruv throughout the neighborhood, one may not take out, bring in, or carry from one domain to another, and that the prohibition applies on Shabbos Kodesh and Yom Kippur.

This was not a one-time reference. Badatz Tishrei guides had already told visitors that there is no eruv in the neighborhood and that carrying is forbidden on Shabbos and Yom Kippur. On 4 Tishrei 5786, the Beis Din again published an express Yom Kippur warning, stating that in Crown Heights and its vicinity it is forbidden to carry in a public domain or transfer from one domain to another on Shabbos Kodesh and Yom Kippur.

The detailed history and provenance of these rulings belong on the Crown Heights rulings pages. Their practical meaning here is that Yom Kippur was deliberately included, not left to inference from the Shabbos ruling.

Prepare the things you will need before Yom Kippur

Yom Kippur creates its own recurring carrying problems because people may spend many hours away from home and may need more items in shul than on an ordinary day. A machzor, Tehillim, a tallis or kittel that is not already being worn, keys, tissues, reading material, a bag, food or drink for a child, a stroller, a diaper bag, or other personal items can all become a carrying question once Yom Kippur has begun.

The straightforward approach is to arrange ordinary needs in advance. Items that will be needed in shul can be brought there before Yom Kippur. Things needed at home after the fast can be left at home. Parents who expect to bring children out during the day should think through the stroller, food, diapers, and other supplies before the fast begins rather than discovering the problem on the way to shul.

The Badatz's Tishrei guide gives a particularly practical reminder on Erev Yom Kippur: check your pockets before nightfall. Because Shabbos clothing has already been worn during the day, a person may simply forget that a key, tissue, receipt, or other small item is still in a pocket. A small or ordinary item left in a pocket can still create a carrying problem.

More detailed questions about ordinary objects, strollers, keys, siddurim, children, and advance arrangements belong on the practical halachos of carrying page.

A quieter street is still subject to the ruling

Yom Kippur can look very different from an ordinary weekday. Traffic may be lighter, stores may be closed, and many people are in shul. None of that changes the practical Crown Heights ruling. The local notices expressly prohibit carrying on Yom Kippur itself.

That point is especially useful because Yom Kippur may fall during the week. A person who is accustomed to associating hotzaah only with Shabbos can otherwise overlook the issue entirely. The prohibition begins with Yom Kippur and continues through the holy day just as the other melachos do.

Medical and safety needs are a separate subject

A genuine medical, safety, or life-saving need is not an ordinary carrying convenience. Routine needs that can be anticipated should be arranged before Yom Kippur where possible. Urgent situations are governed by their own halachos and are treated separately on the medical and mobility needs page.