1. In our country, a memorable day is set according to a special date. However in America a memorable day is set according to the ordinal day of a special month.

Question

2. When you write a letter, there is a set form. It begins with a greeting like 'Dear Mrs. Johnson.' After you write a body you close the letter with a closing word such as 'Yours truly.'

Are both grammatical?

Answer 1

#1 = You could put a comma (,) after However in the 2nd sentence.

#2 = You could put a comma after "After y ou write a body," if you wished.