Nishmat's Women’s Health and HalachaIn memory of Chaya Mirel bat R' Avraham

  • Hebrew
  • English
  • Espnaol
  • Francais
  • donate
Menu
Side Bar

Day/night for interval

22 January, 2005
Question:

My period started today, Shabbos afternoon, 12 Shevat. The Interval Onah is 28 days from now, since my last cycle was 28 days. The bleeding last month started during the night Onah (12-hour period). This time, however, it started during the day Onah.

When is the next Interval Onah, given that the bleeding began during the evening last time and during the day this time? Which calendar day next month (and which part of that day) do I keep?


Answer:

As long as you do not have a veset kavua (a pattern, which repeated itself at least three times, of getting your period either at regular intervals or on the same day of the month), you always keep the days of separation according to the previous month's dates. In this case, if you got our period during the day, your 28-day interval (haflagah) comes out on Friday, 9 Adar, during the day. You will also separate on two other days: Shabbat, 12 Adar, during the day (the day of the month), and Sunday, 11 Adar, which is your onah beinonit (thirty day interval, which all women have to keep.)

The onah of separation is always based on the previous month, so if you got your period during the day you keep the day onah (sunrise to sunset), and if you got your period at night your onah is the following month is at night (sunset to sunrise).   

Please note that Chabad has a different custom — and write back if this is relevant to you.

This internet service does not preclude, override or replace the psak of any rabbinical authority. It is the responsibility of the questioner to inform us of any previous consultation or ruling. As even slight variation in circumstances may have Halachic consequences, views expressed concerning one case may not be applied to other, seemingly similar cases. All health and health-related information contained within Nishmat's Women's Health & Halacha Web site is intended to be general in nature and should not be used as a substitute for consulting with your health care professional. The advice is intended to offer a basis for individuals to discuss their medical condition with their health care provider but not individual advice. Although every effort is made to ensure that the material within Nishmat's Women's Health & Halacha Web site is accurate and timely, it is provided for the convenience of the Web site user but should not be considered official. Advice for actual medical practice should be obtained from a licensed health care professional.

For further questions or comments: 

The Nishmat Women's Health and Halacha Site is a public service of Nishmat, The Jeanie Schottenstein Center for Advanced Torah Study for Women. This project and others like it are made possible by contributions from people like you. If you have benefited from the service, and wish to enable us to help others, click here to donate.

Users of Internet filtering services: This site discusses sensitive subjects that some services filter without visual indication. A page that appears 100% complete might actually be missing critical Jewish-law or medical information. To ensure that you view the pages accurately, ask the filtering service to whitelist all pages under yoatzot.org.

Accessibility Toolbar