Thank you for contacting us and for using the  Hebcal Yahrzeit + Anniversary calendar.

We don't have any calendar of famous rabbi yahrzeits posted on Hebcal.com 

If you find such a list, you can use the Comma Separated Values (CSV) file import feature to upload it to Hebcal. Read more at

https://www.hebcal.com/home/4322/csv-import-for-yahrzeit-anniversary-calendar

Thanks for using Hebcal. In short, no, you should not look to Hebcal to give precise calculations for dates before 1752 CE. Hebcal uses the proleptic Gregorian calendar and does not attempt to compensate for dates that differ prior to the Gregorian reformation.

https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar#:~:text=The%20proleptic%20Gregorian%20calendar%20is,its%20official%20introduction%20in%201582.

Hi, thank you for contacting Hebcal.

The easiest way to do this might be to use Microsoft Excel to create a spreadsheet and use this Excel macro to convert from Gregorian dates to Hebrew dates.

https://www.dafaweek.com/HebCal/HebCalVb6.php

Thank you for using the Hebcal developer APIs. We apologize for the missing CORS header on our Yahrzeit + Anniversary web API. This was indeed a misconfiguration on our end.

This error is now fixed on our end. You should be able to access this API and your browser will receive the correct 

Access-Control-Allow-Origin header.

Hi, thanks for using Hebcal.

You are welcome to use the free Yahrzeit + Anniversary calendar located at https://www.hebcal.com/yahrzeit

This webiste was designed for individuals, not minyanim, so it's quite limited in its features and offers only a few options for customization. We definitely don't have all of the the features you described. For example, there is no login protection - only an "unlisted link" mechanism that permits anyone who has the link to edit the page. At this time, we don't have plans to add additional features like logins, nor do we have any capability to offer any further customization of the current product.

Feel free to use our existing tool as it is, or consider a commercial solution like ShulCloud for your minyan.

Shana Tova and G'mar Chatima Tova! 

Thanks for using Hebcal.

We regret that we currently don't have the expertise to research this. Do you have a good reference you can point to that lists all of the Chabad holidays that are separate from the standard Jewish holidays?

Thank you for using Hebcal. We are sorry to hear you are having difficulty seeing fast days in your Outlook calendar.

Which fast day is missing? We see Tzom Gedaliah on October 6, Asara BTevet on January 10, etc. 

Thank you for the suggestion! We will consider this for a future version of the Hebcal website.

Shana Tova! We wish you a good inscription in the Book of Life.

Thanks for the feedback. We see how this was confusing.

The page was giving the date and linking to the Vayakhel (single parsha) for 2025. We have corrected it so it now more clearly displays the following:

Parashat Vayakhel-Pekudei is the 22nd and 23rd weekly Torah portion in the annual Jewish cycle of Torah reading. Next read on14 Mar 2026 / 25 Adar 5786.

Thanks for using Hebcal. Hebrew year 5785 is not a leap year.

Vayakhel and Pekudei are read separately in 5785

• Vayakhel 5785 (22 Mar 2025)
• Pekudei 5785 (29 Mar 2025)

To see when the parshiyot are read separately or together in the Diaspora, consult the List of Dates section of 

https://www.hebcal.com/sedrot/vayakhel