Err.
No.
Err the Romans had no concept or way of representing the number Zero Anon, so the year of Christ's Birth was counted as Year 1.
Following your own logic then the decade would turn in 2021.
Can't help your tooth dude. You need a dentist.
Was just trying to help with your ignorance.
Still COMFY61 out there.
It's been up for at least 4 hours and a fascinating meandering flight path.
If he's shilling how's he gonna get paid!