I'm a physicist and programmer who recently started playing with the http://sonoff.itead.cc/en/ Sonoff switches. These are wifi connected and programmable and based on the ESP8266 chip. My "jewish" ideas for using these programmable switches are:

1. Turn on a light half an hour before shabbat and chag and turn it off, whenever my wife wants to go to sleep. :-)

2. Connect them to a Yarzeit lamp and automatically turn it on according to a list of dates.

Since the ESP8266 is quite a limited processor, I'm not sure that I can fit hebcal executable onto it. But since I in any case need to turn to the internet in order to get the the current date (the SonOff switches do not have a battery for a real time clock), I thought that I can then just the same turn to the hebcal web site to do the heavy lifting calculations. (Also, that way I don't need to figure out how to cross compile hebcal and I'm lazy. ;-)

So now my question is if whether it is possible to modify the hebcal REST output? Currently the response from the example query is 67k long, and contains a lot of irrelevant info. Is it possible to get e.g. ONLY the next shabbat/hag cande lighting time?

Hi,

I think it would be beneficial to also export havdalah times in the quick "Refrigerator Times".

I spent some time trying to do this innately in the website, however I could not find something. (I ended up building my own via exported data in excel).

Anyways, just an idea! Love the website :)

I want to remove your calendar from Google Calendar. However, it does not appear under Calendar Settings. There is nothing I can unsubscribe to. What can I do? this is a huge problem, I cannot see any of my actual calendar events because Hebcal uses top two lines. Third request on this issue, and I see others have posted and there has been no answer.

Most online calculators including this one do not accurately calculate the jewish calender because their do not take into account correctlu the celestial event, speciallu the moon phases. For example, the converter claims that 30 CE is the year 3790 while in reality it is should be 4030... A serious error !

Hello, I need to block off all major Jewish holidays and mark them as 'busy'. Now because the holidays start and end on different times I can't just make this a whole day event and mark it as busy. Is there a way to customise your calendar so it will show the exact times of when holidays and shabbat comes in and out and mark the whole time in-between as busy? 

Thank you, 

Shlomo

When I attempt to download one of the leining spreadsheets found here http://www.hebcal.com/sedrot/#download I am prompted for credentials but only if I just want to open it and not save it. If I choose save, I'm not prompted. I'm using IE 11 on Win 7. Doesn't happen with Chrome or Firefox because they make you save the file first then open it.

I pulled up triennial-5777-5780.csv and almost no info is in the column that shows how many psukim there are in each aliyah.

Shabbat Shalom

I created a calendar with Israeli parashot.  When I clicked on Parashat Shmini 2018 (day after Pesach in Israel as shown on calendar , week after Pesach in Diaspora) it showed the diaspora shmini with the Machar Chodesh haftara, which is incorrect in Israel.

shalom

how to make a recurrent event based in the hebrew luach on google calendar?