A monumental moment is a moment that is extremely important or significant. Could be a crucial moment in one's life such as death, birth etc.
Monumental - album - was created in 2010.
Monumental Possession was created in 1996.
Monumental Church was created in 1814.
Torre Monumental was created in 1916.
Monumental Funk was created in 1974.
Monumental Life Insurance Company
Monumentality is the abstract noun form for the adjective monumental.
Americas involvement in the Iraq war is a monumental mistake.
Monumental Clock of Pachuca was created in 1910.
Monumental Bronze Company was created in 1875.
Monumental Cemetery of Bonaria was created in 1829.
Designing and building a rocket that could take people to the moon was a monumental task.