We use the solar calendar.

He suffered from scrofula when he was young.

This mountain is mainly composed of conglomerate.

The Horeki era was an important period in Japanese history.

I check the date using the Japanese calendar.

In Japan, they used to use a lunar calendar.

We enjoy picnicking in this park year-round.

I bought a new calendar.

He is interested in history.

We are currently using the Gregorian calendar.