Somethings aren't being automatically capitalized

It appears that certain contractions starting with “I” aren’t being automatically capitalized. For example i’ve, and i’m

Also, certain words that should be capitalized aren’t being automatically capitalized. For example: months, and days of the week

How do I correct this.

Right the “i” as word alone will be capitalized but all the others are not in the replacement table of the autocorrect function.

Only way I see is to add ALL words you want into the replacement table.

Most word processors do it out of the box. Needs too be addressed.