2040s

Millennium:	3rd millennium
Centuries:	20th century – 21st century – 22nd century
Decades:	2010s 2020s 2030s – 2040s – 2050s 2060s 2070s
Years:	2040 2041 2042 2043 2044 2045 2046 2047 2048 2049

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 which began on January 1, 2030 to present.

The decade as a whole

This decade will be called "the twenty-forties". The Roman number will be MMXL.

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