J/28

Okay, so j/28 is a code that people use to talk about something called the Julian day. Julian day is a way of counting days that helps scientists and astronomers keep track of when things happened in history.

Think of it like this, imagine you have a big calendar on your wall with all the days of the year on it. Now, imagine that you take all those days and put them in a big line, one right after the other. That's kind of like what Julian day does.

But why do we need to count days like this? Well, sometimes things happen over a really long time period, like thousands of years. And if we tried to count all those days on a regular calendar, it would get really confusing! So instead, we use Julian day to make it easier to keep track of things.

Now, let's talk about the j/28 part. The "j" stands for Julian and the 28 is the number of days that have passed since some very important date in the past (January 1, 4713 BCE to be exact, but you don't need to remember that!).

So, if someone says j/28, they're basically saying that they are talking about a specific day in history and they're using Julian day to make it easier to keep track of. It may seem complicated, but it's really just a different way of counting days!