Thanks for contacting Hebcal!

From within Flutter, you can use any of the Hebcal developer APIs

https://www.hebcal.com/home/developer-apis

Good luck!

Hi, thanks for using Hebcal!

The 2nd day of Tevet is expected to fall.on different Gregorian calendar dates. For example:

If you have a Yahrzeit occuring on that date, you should expect to see the anniversary sometimes in December and some years in January.

Hi, thanks for using Hebcal! Sorry to hear that you're having difficulty downloading.

Most users are able to successfully download by following our step-by-step instructions for importing Hebcal calendars into the following applications:

• Apple iPhone / iPad 
• Apple macOS
• Google Calendar
• Outlook for Windows

If after reviewing these instructions, you continue to experience difficulty, could you please post some screenshots with error messages so we can diagnose further?

Happy Chanukah!

Thanks for using Hebcal!

We offer several options for developers to customize zmanim by degrees or minutes. Currently both Havdalah and fast end times can be configured as degrees (defaulting to 8.5 and 7.083 respectively). These options are documented in the @hebcal/core README.

For regular users, unfortunately, we do not yet offer the ability to specify degrees on the Hebcal.com website. There's a toggle between 8.5 degrees for Havdalah (default) or user-specified minutes past sundown. The current website design is limited in this simplicity, which seems to work for the majority of users. At some point we'd like to add more configuration options to the website.

If you are a website user, what kind of settings would you like access to? Do you have an example application you've seen that could help to demonstrate the kind of user interface for setting these options that you could share a screenshot of?

Sorry to hear about your duplicate calendar events. It sounds like you may have subscribed to multiple Hebcal calendars in Google Calendar.

You can follow these instructions to unsubscribe/delete the extra calendars from your Google account

https://www.hebcal.com/home/4383/google-calendar-delete-hebcal

Please note, there is a confusingly similar named Android app called HebCal & Widget available on the Google Play store. This app is not affiliated with Hebcal.com in any way. It is developed by a completely separate organization called BotenSoft. The Hebcal name isn't trademarked so we can't stop them from using it.

Although they use the same name, we have no relationship with BotenSoft and cannot offer support for their app.

We have corrected the algorithm on the Hebcal website so it now displays the correct reading for Sunday, 28 April 2024 (and for future years where Pesach falls on the same days of the week, such as 2028 / 5788).

Hi, thanks for using Hebcal.

If you would like the dates to be right-to-left, please visit https://www.hebcal.com/hebcal and for the Event titles Language selector, choose "Hebrew" or "Hebrew (no nikud)" as follows:

All other language options will render the calendar left-to-right.

yes, correct! True for sunrise, false for sunset

Thanks Gabriel, we can confirm that there is a discrepancy on Sunday, 28 April 2024 / 20 Nisan 5784 between what Hebcal.com publishes and what Rabbi Miles Cohen luach publishes. Hebcal is displaying the Pesach Chol HaMoed Day 3 reading (Exodus 34:1-26; Numbers 28:19-25) and Rabbi Cohen's luach displays the Chol HaMoed day 4 reading (Numbers 9:1-14, 28:19-25).

We are investigating further and we will get back to you.