This custom began in the Edo Period. ✬

This custom dates from the Edo period. ✬

We have French third period. ✬

When writing a sentence, generally you start with a capital letter and finish with a period (.), an exclamation mark (!), or a question mark (?). ✬

This custom began during the Edo period. ✬

Many have suffered oppression and misery for a long period of time under the rule of colonialism. ✬

What period is this painting from? ✬

What class do you have first period? ✬

Ten years is a really long period of time. ✬

You forgot to put a period at the end of the sentence. ✬