Correct
末伏
/ mòfú /
Strokes
Definition
middle ten days of August, the last of 三伏 sān fú, three hottest periods of the year
Example
As a Noun
last/third fu ［last of the three ten-day periods of the hot season］
As a Noun
first day of the last/third fu ［first day of the last period of the hot season］