The title refers to the name of a month of the French Republican Calendar, a spring month.

The opera takes its name from the tenth month of the French Republican Calendar.

Thermidor was a month in the French Republican Calendar.

The French Republican Calendar was similar, but began its year at the autumnal equinox.

Decade, in the French Republican Calendar and the Dutch language, a period of 10 days.

The new French Republican Calendar was then legally enforced.

In the French Republican Calendar, each month consisted of three ten-day weeks, called décades.

The republic also adopted the French Republican Calendar.

The play is named for the eleventh month of the French Republican Calendar.

It was the first day of the French Republican Calendar.