In the documents i have read it state that i can download the calendar to my synagogue site. I am in the middle of writing a web site called The Kosher Project which is not associated to a synagogue do i still have permission to down load the calendar?

i would like to implement your api and i am working with it for a week and i found 2 bugs on this call
https://www.hebcal.com/hebcal?v=1&cfg=json&maj=on&min=on&mod=off&nx=on&year=now&month=x&ss=on&mf=on&c=off&geo=pos&latitude="+lat+"&longitude="+lng+"&tzid="+zone+"&s=on&lg=ru&d=on&i=on

1. the word "Tishrei" is not translated in russian
2. There is no Torah reading on 6 day of Sukkot

thats a shame is this api alpha? if not, so thats to much bugs for one week using :(

It appeared double. I deleted one, all are gone. 

You used to be able to easily change months. Now the site seems to only allow changing years.

This refers to the buttons at the bottom in the list format.  For example, if viewing October, 2020 you’d see buttons pointing back to September, 2020 and forward to November, 2020.

Now I see buttons pointing to (October) 2019 and October (2020).

Eruvin 40 addressed the topic of what to do when Rosh HaShanah fell on Shabbat, on the very day that Rosh HaShanah fell on Shabbat. Is there any way to predict when this particular alignment of daf and event (Eruvin 40 coincides with 29 Elul or 30 Elul) might occur again?

My boss asked me to get him a calendar with basic daily zmanim and Friday, shabbat and special dates .

he wants shke-ah and chatzos daily and the shabbat and yom tov zmanim. can hebcal do that? idon't see the option for any daily zmanim

Can Rosh Hashanah LaBehema (https://en.wikipedia.org/wiki/Rosh_Hashanah_LaBehema) be added to the calendar? I previously wasn't aware that there were 4 Rosh Hashanot observed, and this holiday has been experiencing a resurgence in observance, besides the fact that it's pretty cool. It's the first of Elul. A lot of people use Hebcal and having it added also would increase its awareness.