The origin of the calendar has been dated as 825 CE.

The origin of American Colonial can be dated with some accuracy.

Its modern origins may be dated to several significant changes on the 1780s.

The origin of the genus Gossypium is dated to around 5-10 million years ago.

The origins of the castle can not be clearly dated.

The origins of the use of this term can be dated further back.

However, the origins of the church can be dated back to the 12th century, indicated by traces in its walls.

The origins of the castle cannot be clearly dated.

The origins of automatonophobia can be dated to thousands of years ago.

The origins of this tradition have been dated at least to the 16th century.