FYI, you're writing this wrong!
Generally, we call this year just "536".
If you're religious, you'd call it "AD 536" - "in the 536th year of our Lord". Note that the AD comes before the name and there's a space after it.
If you're not, you call the year "536 CE" - CE for "common era". Note the space.
A nice clear source: https://blog.esllibrary.com/2015/11/05/abbreviations-bc-ad-bce-ce/
My guess is that you are trained in some scientific field, because SI units are expressed that way, without the space: 1kg, 10N, etc. I have that habit too, and I had to learn the exceptions.
Great article overall, have some claps!