We made a little bit of progress on this recently (8b4e93d). We have added several new functions to the Zmanim class to support calculations according to the Baal Hatanya. We haven't added the "Chabad" feature you requested just yet, so this is just a step in the right direction.

alosBaalHatanya: Alot HaShachar (Baal Hatanya)
Dawn. Sun is 16.9° below the horizon in the morning, based on the time of 72 minutes before netz amiti (sunrise) in Jerusalem around the equinox

sofZmanShmaBaalHatanya: Kriat Shema, sof zeman (Baal Hatanya)
Latest Shema (Baal Hatanya). 3 shaos zmaniyos (solar hours) after netz amiti (sunrise), calculated from sunrise to sunset

sofZmanTfilaBaalHatanya: Tefilah, sof zeman (Baal Hatanya)
Latest Shacharit (Baal Hatanya). 4 shaos zmaniyos (solar hours) after netz amiti (sunrise), calculated from sunrise to sunset

minchaGedolaBaalHatanya: Mincha Gedolah (Baal Hatanya)
Earliest Mincha (Baal Hatanya). 6.5 shaos zmaniyos (sea level solar hours) after netz amiti (sunrise), calculated from sunrise to sunset

minchaKetanaBaalHatanya: Mincha Ketanah (Baal Hatanya)
Preferable earliest time to recite Minchah (Baal Hatanya). 9.5 shaos zmaniyos (sea level solar hours) after netz amiti (sunrise), calculated from sunrise to sunset

plagHaminchaBaalHatanya: Plag HaMincha (Baal Hatanya)
Plag HaMincha (Baal Hatanya). 10.75 shaos zmaniyos (solar hours) after netz amiti (sunrise), calculated from sunrise to sunset

tzaisBaalHatanya: Tzeit (Baal Hatanya)
Nightfall (Baal Hatanya). Sun is 6° below the western geometric horizon after sunset

Hi, thank you for your thoughtful question!

This is a fascinating topic in Jewish history, but it's beyond the scope of what Hebcal.com covers — we focus on providing Jewish calendar dates, holiday times, and Torah readings rather than historical analysis.

Here are some great places to dig deeper:

• Wikipedia's "Tisha B'Av" article has a good overview: https://en.wikipedia.org/wiki/Tisha_B%27Av

• TheTorah.com has an excellent scholarly article called "Tisha B'Av: On What Day Were the Jerusalem Temples Destroyed?" that directly addresses your question: https://www.thetorah.com/article/tisha-b-av-on-what-day-were-the-jerusalem-temples-destroyed

• The Talmud itself (Ta'anit 29a) discusses this — you can find it on Sefaria.org

Hope that helps point you in the right direction!

Thank you for your feedback. Chag sameach!

Shimshon’s answer is spot on. The Hebcal link for Parashat Re’eh on August 24, 1968 (https://www.hebcal.com/sedrot/reeh-19680824) has exactly what you need.

To clarify one point that sometimes causes confusion: the choice of Chumash (e.g., ArtScroll Stone Edition vs. others) can affect how the aliyah divisions are marked in certain parshiyot, but it would not affect the haftarah reading. And in the case of Re’eh specifically, this isn’t even an issue — the aliyah breaks are the same across standard Orthodox chumashim.

So you’re all set with that link. Mazal tov on revisiting your bar mitzvah parsha!

Thank you for this suggestion, we will look into implementing this after Pesach

Hebcal doesn’t have a denominational bias. The authors are Jewish and we embrace every movement and denomination of Judaism: Orthodox, Conservative, Reform, Chabad, Reconstructionist, Renewal, Liberal, and Humanist. We are observant of the mitzvot, and we offer this website because we want to help other Jews with their observance. This website also serves as a reference and resource for non-Jews who wish to avoid scheduling secular events in a way that would interfere with observance of Jewish holidays.

You could call us “Conservadox” if you must use a label, but we don’t really participate in any one movement of Judaism more than others. 

Hi Hilary,

Thanks for reaching out, and glad you're enjoying the Hebcal calendar (emojis and all!).

Great news — this is easy to fix! If you subscribe to the calendar using Outlook's "Internet Calendar Subscription" feature, the holidays will appear on a separate calendar layer rather than being added directly to your primary calendar. That means they won't affect your availability or set you as Out of Office.

You can find step-by-step instructions here:

https://www.hebcal.com/home/8/outlook-ics-jewish-holidays

Once you set it up this way, you'll still see all the holidays on your calendar — they just won't interfere with your free/busy status.

If you downloaded a copy of the Hebcal events and merged them into your own calendar, then yes, the major holidays are set as Out of Office (although minor holidays are not). To remove those merged events, follow these instructions:

https://www.hebcal.com/home/58/outlook-csv-delete-hebcal-jewish-calendar

Let me know if you have any further questions!

Glad that this resolved the issue for you. Chag Pesach Sameach!

Thank you for the bug report! We found the cause of the error (an incorrectly CSS which was setting the background color to white and the text to white) and we have fixed it. If you refresh the page it should appear correctly again.

Thank you for the bug report! We found the cause of the error (an incorrectly set background color) and we have fixed it. If you refresh the page it should appear correctly again.