Simplify the following text for a Grade 7 native English-speaking person.
Original: The 23rd century is the century of the Christian Era or Common Era which , in the Gregorian calendar , begins on January 1 , 2201 and ends on December 31 , 2300 .
Simplified: The 23rd century is a century that lasts from January 1 , 2201 , to December 31 , 2300 .