Respuesta :

jordanadams1994
"my friends went to a concert last Monday on Labor Day."
The M in 'my' needs to be a capital letter since it is in the beginning of the sentence. 'Monday' and 'Labor Day' or correctly capitalized. 
Words that need to be capitalized:
My.

My needs to be capitalized because it is the first word of the sentence and all first words in a sentence NEED to be capitalized.

hope it helps!