2040s

Millennia: 2nd millennium - 3rd millennium - 4th millennium

Centuries: 20th century - 21st century - 22nd century

Decades: 1990s 2000s 2010s 2020s 2030s - 2040s - 2050s 2060s 2070s 2080s 2090s

Years: 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049

The decade as a whole

This decade is expected to be called "the twenty-forties" or "the forties".