How do you spell 1200s?

The 1200s can be spelled in a few different ways, depending on what you're trying to convey:

Formal:

* 1200s (This is the most common and neutral way to write it.)

Informal:

* Twelfth century (This refers to the entire century from 1200-1299.)

Specific Years:

* The 1200s (This is a way to refer to the years 1200-1209.)

* The 1210s (This refers to the years 1210-1219.)

* The 1220s (This refers to the years 1220-1229.)

* And so on...

The best way to spell it will depend on the context and the specific time period you are referring to.