Rivkah Bloom earned her Bachelors of Computer Science and Electrical
Engineering and her Masters of Computer Science from MIT. She was
a research assistant at the Laboratory for Computer Science at MIT where
she wrote her thesis on ad-hoc mobile routing. When she is not working
she is usually found playing soccer, making muffins, and exploring the
world with her energetic boys.
Our software specialist will remain anonymous for now. He is also an
MIT alumnus and just completed a PhD in Computer Science
from Yale University.
Now a veteran interactive designer, Gepner's background
includes a traditional B.S. in Business Management from The Carlson School
(U of MN) and both production and creative roles in radio /
TV broadcast for Radio-K, UMR, PBS, HISTORY, and UPN before moving into
web media. Dan lives with his wife and girls in Minneapolis, MN.
Merrilyn Romen is an award winning Creative Director for both print
and web designing and executing feature film campaigns, record album
art, logos, packaging and websites for Fortune 500 companies.
Always wanting her work to serve some greater good, Merrilyn discovered
that simplicity and elegance transform complex concepts that impact the
Any time blood leaves a woman's uterus not due to trauma.
From the Start of Flow until the wife's immersion in a mikvah,
she and her husband must follow the laws of Niddah conduct.
This includes refraining from physical relations.
The date and hour that a woman first notices her flow.
Internal Examination with a white cloth to ascertain that bleeding
has completely ended. According to most opinions, at least
five days must elapse
from the Start of Flow before performing a Hefsek Tahara.
Some Sefardic opinions require only four days.
Seven consecutive days between the Hefsek Tahara and Mikvah Night.
The woman performs two internal examinations each day (bedikot) between
sunrise and sunset. If blood is found, she must perform another Hefsek
Tahara as soon as she is able and start her Seven White Days from
the new Hefsek Tahara.
Immediately following the woman's seven white days. After emerging
from the mikvah, the woman enters the new status of “Tehorah” or “Pure”.
A woman may not immerse in the Mikvah on the nights of Yom Kippur,
Tish'a B'av, or a night of one of her Anticipated Flows (Vestot).
In these cases, Mikvah night would be pushed off until the following
Relations are not permitted during an Anticipated Flow.
MikvahCalendar.com has the most advanced Kavuah system in the world. Detecting, calculating, and reminding our members of their various Kavuah patterns.
Internal Examination with a white cloth.
A woman must perform an internal
examination on a few occasions:
From Sunrise to Sunset (Day) or Sunset to Sunrise (Night)
From Sunset to Sunset which is a full Hebrew Day.
This program is perfect for you! Almost all women today fall into the
category of having “irregular” periods as determined by Jewish
Definitely! MikvahCalendar.com will calculate correctly regardless of
the frequency of your periods.
When you enter a new flow immediately following your birth/miscarraige, you are able to indicate a birth by checking the box, “A birth has occurred since my last flow.”
MikvahCalendar.com will use this information to ensure proper calculations of anticipated flows.
Yes. The five minimum day waiting period before performing the Hefsek Tahara is necessary even when the cause of Niddah is spotting.
No. If you have already been in niddah for 5 days (for example your flow starts during your 7 White Days), you can try and perform a Hefsek Tahara as soon as possible. MikvahCalendar.com automatically calculates your earliest Hefsek Tahara date using this information.
Your calendar page contains a central pink instruction box. After you have entered your "start of flow", you will see a button appear in this pink box which says, "To enter an earlier Hefsek, click here". You can click on this button and your minimum wait time will be removed.
You can always record your dates at a later time as long as all dates
are entered in chronological order. (Although you should make every
effort to record them on time so as to be aware of upcoming important dates.)
Click the "X" in the upper right corner of the date to delete the
most recent flow or hefsek. You may then enter the correct date and time.
You would still continue to use mikvahcalendar.com as normal. If you have
any concerns, you should speak to your Rav.
We have made every effort to list in the drop down box most major
cities. However, if your city is not there-you can input its latitude and
longitude so that mikvahcalendar.com can automatically calculate all of
your important times. You can find your latitude and longitude by typing “latitude
longitude” and your city's name into www.google.com.
We will use this information, together with the time zone that you choose
to calculate all of your relevant times.
If you travel across the International Date Line, you should ask a Rabbi
to find out how that might affect your important dates.
Your information is
automatically saved every time you enter new information!
Rabbi Fishel Jacobs would be happy
to answer your questions. He displays extreme sensitivity and patience
in all cases. He can be reached at email@example.com.
Everything is completely confidential.
Yoetzet.org has a confidential hotline staffed by women who are experts
in the laws pertaining to Family Purity.
You can access their number at: http://www.yoatzot.org/hotline.php.
You can also email them at: http://www.yoatzot.org/ask.php.
And of course, you can always call your community Rabbi or Rebbetzin.
Just wait for your important dates and times to be emailed and/or texted
Most women ovulate 14 days before they get their next period.
The calculation shown on your calendar will be more accurate for women with regular periods.
Most OBGYNs recommend using a calendar in conjunction with other tests for ovulation to women trying to calculate
the actual day of ovulation. We have calculated your estimated ovulation if your periods are at least 18 days apart.
There is a special fund set up called "Purity with Dignity" which covers the cost of the monthly Mikvah visit and a free box of Bedika cloth for any Jewish woman who is unable to do so herself. You can help a Jewish woman cover the cost of immersing in the mikvah by following this link.
We would love to hear from you! Is there something you especially like about this program?Do you think something can be changed? Please send us your comments.
Rabbi Fishel Jacobs, author of Family Purity and Chochmot HaTahara, would be happy to answer questions relating to Taharat Hamishpachah. He displays extreme sensitivity and patience in all cases. You can write completely anonymously, and this email is seen only by Rabbi Jacobs.
MikvahCalendar.com has been expertly approved and recommended by Rabbonim, Yotzaot, and Kallah teachers around the world including:
Thank you for this wonderful program! It makes keeping the calendar fun.
-Batsheva, Tel Aviv
I just wanted to let you know how wonderful your website is and how much easier it has made my life! G-
d bless you all for this amazing program.
-Sherri, Cape Town
You have made it possible for me to truly keep Taharat Hamishpachah properly. I thank you from the
bottom of my heart.
Hi! I absolutely love this web site. It is the best thing internet was ever used for!!
I just wanted to let you know that I have been a member of your website for almost 9 months. Before I
joined I would forget to write things down or mess up on the calculations. My husband found out about
your website and encouraged me to join. Since then it has been great. I get email reminders. I can
look back on the calendar and see my history. I am so thrilled that you set up this website. It has really
helped me a lot.
I now realize that I have been going to the Mikvah one night too early since I’ve been married. I am only
glad that now I can start keeping the laws of Mikvah at the correct time.
It is phenomenal that I receive my reminders via SMS in the Ukraine! The technology is amazing.
Your website has allowed women who are becoming more observant later in their marriages to keep all of
the intricate laws of Taharat Hamishpachah without overwhelming them. Yasher Koach!
-Rabbi L., Jerusalem
I am a Kallah teacher. I must say that I am impressed with the site, and I send you compliments for
what you are doing with Klal Yisroel and Brachos for Hatzlacha with your holy work. I especially like the
different Halacha options you offer. I was able to punch the buttons for exactly the way my Rov holds.
(Rabbi Forst in Far Rockaway).
-A Kallah Teacher, NY
I can only imagine how hard it was to make this program and to continue to run it and update it, but it is
so important. Thank you so much!!!
-Rochel Leah, Paris
I cannot tell you how many mistakes I’ve made in my calculations. To tell you the truth, there were many
months where I completely forgot to calculate anything. Most of the time I would also forget my bedikos
during my 7 white days. Since I’ve been using MikvahCalendar.com, I have been able to observe
-Mia, Mexico City
Names have been changed to protect anonymity.
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