The east Asian lunisolar calendar divides one year into 24 parts (sekki), with each of those parts having 3 further divisions (pentad), dividing a year into a total of 72 parts.

I like the connection of the names of the division to nature. Each sekki roughly describes the 15 days it intervals, and each pentad is a short literary description of the period it spans.

処暑([i]chǔshǔ[/i]) - end of heat, 23 - 24 August. This is around beginning of autumn.
Its third pentad in japanese and chinese means "Grains become ripe for harvest"
a0244794_1951743.jpg