To the best of my knowledge the Molad is every 29.5 days + 793 Chalakim. Is there any information showing if the current Molad calculation is accurate scientifically? If it is off by how much is it ...
Inspired by Why make a bracha on an earthquake but not on an eclipse? When something can be predicted in advance to an exact moment - for example an eclipse which Chazal say it is a bad Omen (Sukkah ...
I have heard different opinions concerning whether taxes can be deducted before calculating maaser. It is logical to me that if you cannot deduct your expense to live in your house, you shouldn't be ...
Regarding the year of Jesus' birth, it says in Seder HaDoros (Year 3724) that the year 3724 and the year (3)532 are really the same. What in the world does he mean? Its in the first column first ...
As I understand it, a day in the Jewish calendar is from sunset to sunset. How is this handled if you are living so far north or south that you have long periods of daylight or darkness?
I'm writing a site where the user would be able to see the calendar with jewish-civil translation of dates, and also which parasas shavua falls on which Shabbos. I'd like to know what is the formula ...