2040s

The 2040s will begin on January 1, 2040 and end on December 31, 2049. It is distinct from the decade known as the 205th decade will begin on January 1, 2041 to December 31, 2050. 

 The decade as a whole 
This decade will be called "the twenty-forties" or "the two thousand (and) forties". The Roman number will be MMXL.

Generation Beta will become adults starting in 2043.

The first baby boomers will be 100 years old in 2046.