Summer is the subject. The first "is" is the question marker. So, 'is the best time of year' is the predicate.
summer
summer.
The best time to wear a chiffon skirt would be summer. The reason that a chiffon skirt is best worn in summer is because summer is the warmest time of year, and skirts are worn in summer.
The best time to visit the Canary Islands is during the spring. The summer is also a good time, with the hot summer weather, but it will be busier that time of year.
in summer. because in summer we have best whether
Late summer and early autumn is the best time.
in the summer is the best time of year with the sun
summer and spring
summer
Summer that is when it is pretty out side
summer holidays!
Early summer and late spring.