
According to Jewish law, it is a mitzvah to cut one's nails on Erev Shabbos, or the day before Shabbat, to honour the holy day. However, there are differing opinions on the specific day of the week when nails should be cut. Some sources say that cutting nails on Thursday is discouraged because they will start regrowing on Shabbat, while others suggest cutting toenails on Thursday and fingernails on Friday. There is also a custom of not cutting nails sequentially, which is said to bring forgetfulness, poverty, and premature death of one's children.
| Characteristics | Values |
|---|---|
| Day of the week to cut nails | Wednesday, Thursday, or Friday |
| Day of the week to avoid cutting nails | Saturday night, Sunday, Thursday, and Rosh Chodesh |
| Order of cutting nails | Out of order, not sequentially |
| Nails to cut | Fingernails, toenails, or both |
| Time of day to cut nails | Daytime, after midday on Friday, or before midday on Friday |
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What You'll Learn

Fingernails and toenails should not be cut on the same day
According to the Mishna Berurah, the reason for not cutting nails on Thursday is that they begin to grow three days after being cut. Therefore, if nails are cut on Thursday, they will begin to grow on Shabbos, reducing the level of honour for Shabbos. However, there is no prohibition with causing them to grow on Thursday, so if one is unable to cut their nails on Friday, it is acceptable to do so on Thursday.
The ideal day to cut one's nails is Friday, in honour of Shabbos. This is because nails begin to regrow on the third day after being cut, so cutting them on Friday means they will not start regrowing on Shabbos. It is also preferable to cut nails after midday on Friday. However, some people choose to cut their toenails on Thursday and their fingernails on Friday, to avoid cutting both on the same day.
There are different customs regarding nail-cutting. Some people are cautious to only cut their nails on Erev Shabbos and Erev Yom Tov, while others cut their nails from Wednesday to Friday, as these days have a connection to the upcoming Shabbos. Ultimately, if one's nails are becoming bothersome, it is acceptable to cut them even during the week.
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Trim nails in honour of Shabbat
It is considered a mitzvah to cut one's nails in honour of Shabbat. This practice is known as trimming nails on Erev Shabbos, and it is observed on Fridays. However, there are specific customs and traditions associated with this ritual.
Firstly, it is generally advised to refrain from cutting nails after sunset on Wednesday evenings, which are considered the beginning of Thursdays. This is because cutting nails on Thursdays is discouraged, as nails start regrowing on the third day after being cut, and it is considered inauspicious for them to regrow on Shabbat.
Secondly, it is preferable to cut fingernails rather than toenails in honour of Shabbat, as fingernails are more visible. Toenails are typically cut on Thursdays, while fingernails are reserved for Fridays. However, if one cannot cut their nails on Friday, it is permissible to do so on Thursday.
Additionally, there is a custom of not cutting fingernails and toenails on the same day. This belief is associated with a cryptic Hebrew phrase that translates as "question without answer," suggesting that the reasons for this practice may be mysterious or symbolic.
The order in which nails are cut also holds significance. According to one interpretation, the phrase "קמיצה שמאל ימין אצבע" serves as a mnemonic for the proper sequence, starting with the left ring finger.
In summary, trimming nails in honour of Shabbat involves adhering to specific days of the week, prioritising fingernails over toenails, avoiding cutting nails on the same day, and following a particular sequence for trimming each nail. These customs are observed by Jews to prepare for and honour the Shabbat.
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Nails should not be cut on Thursdays
The Mishna Berurah (260:6) writes that there is a custom not to cut one’s nails on Thursday. The reason being that nails begin to grow three days after being cut. Therefore, if one cuts them on Thursday, they will begin to grow on Shabbos. The Aruch Hashulchan (260:6) notes that there is no prohibition with causing them to grow on Thursday, and therefore if one is unable to cut them on Friday, they may do so on Thursday.
Some people cut their toenails on Thursday and their fingernails on Friday. This is because it is more important that the fingernails, rather than the toenails, be cut in honour of Shabbos. However, it is discouraged to cut both toenails and fingernails on the same day for reasons related to well-being and prosperity.
There are two customs regarding cutting nails during the week, prior to Erev Shabbos. The first custom is to only cut nails on Erev Shabbos and Yom Tov. The second custom is to cut nails from Wednesday to Friday, as these days have a connection to the upcoming Shabbos. However, it is preferable to cut nails on days closer to Shabbos, such as Friday or Thursday.
It is a Mitzvah to cut one's nails on Erev Shabbos. However, if one does not desire to wait until then, they may cut them during other days of the week.
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Nails should not be cut on Rosh Chodesh
Rosh Chodesh, the Jewish New Moon, is considered an inauspicious day for cutting nails. According to Rabbi Yehudah he-Chassid (1150–1217), there are mystical reasons why one should refrain from cutting nails on Rosh Chodesh. The Ashkenazic custom also supports this, as it is believed that one should enter a Jewish holiday well-groomed, and not leave grooming until after the holiday has begun.
There is a belief that cutting nails on Rosh Chodesh can bring forgetfulness, poverty, and even premature death of one's children. This belief is based on ancient customs and traditions, with the earliest mention of this belief found in a version of Masechet Kallah, written by Rabbi Simchah ben Shmuel of Vitry in 1105. The text warns against cutting nails sequentially, starting with the left ring finger, and provides a mnemonic to remember the correct sequence and timing: "באזהרה (warning) לך (to you) אתה (you) תקוץ (cut) יום (day) רביעי (fourth) והלאה (and on) צפרניך (your nails)".
The custom of not cutting nails on Rosh Chodesh is further supported by the belief that one should only cut nails on Erev Shabbos, the day before Shabbat, as it is considered a Mitzvah to do so. This is because nails start regrowing on the third day after being cut, and cutting them on Rosh Chodesh could result in nail regrowth on Shabbat, which is considered disrespectful.
However, there are differing opinions on this matter. Some sources suggest that if nails are particularly long, they should be cut regardless of the day. Additionally, when Rosh Chodesh falls on a Friday, which is the day before Shabbat, some debate whether one should cut their nails on the preceding Wednesday or Thursday. While some Poskim forbid cutting nails on Rosh Chodesh, even when it falls on Erev Shabbos, others suggest that one can be lenient and cut their nails on Thursday instead.
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Nails should be cut in a specific order
According to Jewish law, it is a mitzvah to cut one's nails on Erev Shabbos, which is Friday. This is done to honour Shabbos, as nails begin to grow on the third day after being cut. Therefore, if nails are cut on Thursday, they will begin to grow on Shabbos, reducing the level of honour for Shabbos.
However, there are different opinions on the specific order in which nails should be cut. Some sources suggest that one should start with the left ring finger, followed by the right ring finger, and then move to the index finger. This sequence is derived from a Hebrew mnemonic, which translates as "question without answer."
It is also considered inauspicious to cut the nails of both hands and feet on the same day. As a result, some people cut their toenails on Thursday and fingernails on Friday, or vice versa. However, others believe that cutting nails on Thursday is not ideal, as it is too close to Shabbos.
Additionally, it is advised to refrain from cutting nails after sunset on Wednesday, as this is considered the beginning of Thursday. Cutting nails during the daytime is preferable, and it is generally recommended to consult a Chabad Calendar to ensure adherence to these guidelines.
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Frequently asked questions
It is considered a Mitzvah to cut your nails on Erev Shabbos (Friday) to honour Shabbos. However, some sources suggest that it is better to cut them on Thursday or Wednesday to avoid them growing back on Shabbos.
Yes, there is an ancient custom of not cutting nails sequentially. The order is: left ring finger, right ring finger, left index finger, right index finger, and so on.
Toenails that are not visible are not considered a Mitzvah to be cut before Shabbos. However, some people choose to cut both their fingernails and toenails in honour of Shabbos.
Yes, it is generally advised to avoid cutting your nails on Rosh Chodesh, Shabbat, or Saturday night. Some sources also suggest avoiding Wednesday night and Thursday.











































