1 to 100.
There was no year 'zero'.
The year 10 AD falls in the 1st century. The 1st century encompasses the years 1 to 100 AD. Therefore, any year within that range, including 10 AD, is part of the 1st century.
1st century AD
The 1st century AD.
The 1st century AD.
The 1st century AD.
36 AD was the 1st century.
72AD was in the 1st century AD.
79-81 AD was the 1st century AD.
4 AD is in the 1st century. The 1st century spans from the year 1 AD to the year 100 AD. Therefore, 4 AD falls within this timeframe.
1st century
The year 100 was the last year of the 1st century AD. As of the 4th of March 2015 that is just over 1914 years and 2 months ago.
1st century