Our Khums date used to be the 11th of Dhul Qadah but then because the Islamic dates kept changing around we decided to follow the Gregorian calendar and set our Khums date as the 15th of August. So do we have to start counting all the income we have left over from maghrib time on the 14th or do we start counting what we have left from 00.01am on 15th August?
It’s just that we wanted to buy a wardrobe today (14th August) before maghrib but now it’s maghrib already so we were just wondering that the money we use to buy the wardrobe after maghrib, is Khums wajib on that money?

It would be from 12am 15th August